Grouping and Arithmetic
Multiplication of Groups
Distributive Law - Multiplication and Addition of Groups
Distributive Property
Distributive Law - Multiplication and Addition of Groups
Distributive Law - Division and Addition of Groups
Fraction Simplification
Fraction Simplification
Fraction Simplification
Simplification
Simplification and Distribution
Simplification and Distribution
Simplification and Distribution
Solving an Equation
Solving an Equation
Solving an Equation
Word Problem - System of Equations
Word Problem - System of Equations
Exponent of a Quantity
Exponent of a Quantity
Exponent of a Quantity
Scientific Notation
Scientific Notation
Scientific Notation
Multiplication of Variables with Exponents
Multiplication of Variables with Exponents
Multiplication of Variables with Exponents
Scientific Notation
Scientific Notation
Scientific Notation
Scientific Notation & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation with Division & Multiplication
Function Evaluation at a Point
Distributive Law
Solving an Equation
Solving an Equation with Fractions
Solving an Inequality
Multiply Quantities
Factoring a Polynomial
Solving a Quadratic Equation
Vector Magnitudes and Angles
Vector Magnitudes and Angles
Fraction Comparison
Solving a Quadratic Equation
Solving a Quadratic Equation
Solving an Equation with Fractions
Solving an Equation with Fractions
Solving an Quartic Equation
Probability
Probability
Probability
Probability
Basic Statistics
Graphing a Quadratic Function
Graphing a Linear Function with Intercepts
Determine the Slope Between Two Points
Parameters of a Parabola
Graphing an Exponential Function
Solve a System of Equations via Substitution
Solve a System of Equations with Addition
Function Minimization
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Multiplication of Exponents
Multiplication of Exponents
Multiplication of Exponents
Division of Exponents
Division of Exponents
Division of Exponents
Solving an Equation
Multiplication, Distribution and Simplification
Multiplication, Distribution and Simplification
Addition of Fractions
Addition of Fractions
Addition of Fractions
Multiplication of Fractions
Multiplication of Fractions
Multiplication of Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Word Problems with Fractions
Squaring Quantities
Squaring Quantities
Squaring Quantities
Laws of Logarithms
Word Problems - Differences and Changes
What Does 15 1/3 - 7 1/2 Equal?
Derivatives: Quotient Rule
Find the Derivative
Find the Derivative
Find the Derivative
Implicit Differentiation
Limits
Related Rates
Implicit Differentiation
Implicit Differentiation
Limits
Limits
Limits
Limits
Related Rates
Limits
Physical Applications of Derivatives
Linear Approximation
Second Derivatives
Implicit Differentiation
Minimization
Related Rates
Maximization
Physical Applications of Derivatives
Related Rates
Physical Applications of Derivatives
Physical Applications of Derivatives - Maximum and Minimums
Physical Applications of Derivatives - Maximum and Minimums
Related Rates
Physical Applications of Derivatives - Maximum and Minimums
Physical Applications of Derivatives - Maximum and Minimums
Linear Approximation
Higher Order Derivatives
Second Derivatives
Second Derivatives
Function Domains
Limits
Tangent Lines
Definition of Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Tangent Lines
Implicit Differentiation
Physical Applications of Derivatives
Definition of Derivative
Tangent Lines
Higher Order Derivatives
Implicit Differentiation
Values of Derivatives
Values of Derivatives
Find the Derivative
Find the Derivative
Revenues and Profits
Find Derivatives using the Chain Rule
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Hydroxide Concentration Calculation
pH Calculation from Partial Ionization
Chromic Acid Dissociation Calculation
Sulfur-35 Decay Rate Constant Calculation from Activity
Tritium Decay Constant Calculation from Decay Rate
Carbon-14 Decay Rate Constant Calculation from Half Life
Standard Gibbs Free Energy of Reaction Calculation
Molarity Calcuation from Mass and Volume
Moles Present in an Ideal Gas
Heat of Combustion Calculation
Diffusion Rate Calculation of O2 and SO3 With Root Mean Square
Heat Transfer Calculation
Density Calculation of an Ideal Gas
Quanta Calculation
Photon Energy Calculation from Frequency
Radiation Frequence and Wavelength Calculation from Photon Energy
I Quantum Number Calculation
MI Quantum Number Calculation from L
Balancing Redox Reactions in Acidic Solution
Redox Reactions in Acidic Solution
Balancing Redox Reactions in Acidic Solution
Balancing Redox Reactions in Acidic Solution
Redox Reactions in Basic Solution
Balancing Redox Reactions in Basic Solution
Redox Reactions in Basic Solution
Balancing Redox Reactions in Basic Solution
Redox Reactions in Basic Solution
Electrical Work Calculation of a Voltaic Cell
Calculating Work, Heat and Internal Energy Change of a Thermodynamic System
Entropy Calculation from Heat of Vaporization
Standard Entropy of Reaction Calculation with Sodium and Chlorine
Standard Entropy of Reaction Calculation with Silver and Chlorine
Standard Entropy of Reaction Calculation
Standard Entropy of Reaction Calculation with Methanol and Oxygen
Standard Gibbs Free Energy of Reaction Calculation with Ethene and Oxygen
Standard Gibbs Free Energy of Reaction Calculation with Calcium Carbonate in Acid
Calculate the Molar Mass of Potassium Permanganate (KMnO4)
How to Calculate the Molar Mass of Potassium Chloride (KCl)
How to Calculate the Molar Mass of Sodium Sulfate (Na2SO4)
How to Calculate the Molar Mass of Calcium Nitrate ( Ca(NO3)2 )
How to Calculate the Molar Mass of Aluminum Sulfate ( Al2(SO4)3 )
How to Calculate the Molar Mass of Ammonium Phosphate ( (NH4)3PO4 )
How to Calculate the Molar Mass of Copper Sulfate Pentahydrate
How to Calculate the Molar Mass of Magnesium Phosphate ( Mg3PO4 )
How to Calculate the Molar Mass of Zn(C2H3O2)2*2H2O
How to Calculate the Molar Mass of Zn3(PO4)2*4H2O
How to Calculate the Molar Mass of Bicarbonate, H2CO3
How to Calculate the Molar Mass of Hg2Cr2O7
How to Calculate the Molar Mass of Ba(ClO3)2
How to Calculate the Molar Mass of Fe2(SO3)3
How to Calculate Grams of Potassium Chloride Produced from Reaction of 2KClO
Grams of Hydrogen Needed for Reaction
Grams of Ammonia Produced from Reaction
Grams of Silver Chloride Produced from Reaction
How to Determine the Percent Composition of Each Element in Cupric Bromide
How to Determine the Percent Composition of Each Element in Sodium Hydroxide
How to Determine the Percent Composition of Each Element in Ammonium Sulfide
How to Determine the Percent Composition of Each Element in Dinitogen Disulfide
How to Determine the Percent Composition of Each Element in C3H8S
How to Determine the Percent Composition of Each Element in Glucose
How to Determine the Percent Composition of each Element in Strontium Nitrate
How to Determine the Percent Composition of Each Element in Mercuric Oxide
How to Determine the Percent Composition of Each Element in Sodium Sulfide
How to Determine the Percent Composition of each Element in Potassium Carbonate
How to Determine the Percent Composition of Each Element in Ethanol
How to Determine the Percent Composition of Each Element in 3-(Dimethylamino)propionitrile
How to Determine the Percent Composition of Each Element in Ethene
How to Determine the Percent Composition of Each Element in Magnesium Chloride
How to Determine the Percent Composition of Each Element in Ethylene Glycol
How to Determine the Percent Composition of each Element in Oleic Acid
How to Calculate the Molarity of a Potassium Bromide Solution.
How to Calculate the Molarity of a Magnesium Chloride Solution.
How to Calculate the Molarity of a Glucose Solution.
Calculate the Molarity of a Potassium Iodide Solution.
Calculate the Molarity of a Formic Acid Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a sulfuric Acid Solution.
Calculate the Molarity of a Sodium Hydroxide Solution.
Calculate the Molarity of an Aluminum Sulfite Solution.
Calculate the Molarity of a Lithium Sulfate Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a Ammonium Carbonate Solution.
Calculate the Molarity of a PbCl3 Solution.
Calculate the Molarity of a Potassium Bromide Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Potassium Iodide Solution.
Calculate the Molarity of a Sucrose Solution.
Calculate the Molarity of a Ethylene Glycol Solution.
Calculate the Molarity of an Ethanol Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a Nitric Acid Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Glucose Solution.
Calculate the Molarity of a Hydrochloric AcidSolution.
Calculate the Molarity of a Boric Acid Solution.
Calculate the Molarity of a Ferrous Chloride Solution.
Calculate the Molarity of a Sodium Nitrate Solution.
Calculate the Mass of Sodium Carbonate in a Solution.
Calculate the Mass of Sodium Chloride in a Solution.
Calculate the Mass of Cupric Nitrate in a Solution.
Calculate the Mass of Plumbous Nitrate in a Solution.
Calculate the Mass of Magnesium Carbonate in a Solution.
Calculate the mass of Sodium Oxide in a Solution.
Calculate the mass of Sodium Fluoride in a Solution.
Calculate the mass of Potassium Chloride in a Solution.
Calculate the mass of Calcium Chloride in a Solution.
Calculate the mass of Calcium Chloride in a Solution.
Calculate the mass of Lithium Fluoride in a Solution.
Calculate the mass of Sodium Iodide in a Solution.
Calculate the mass of Strontium Nitrate in a Solution.
Calculate the Mass of Sodium Carbonate in a Solution.
Calculate the Mass of Sodium Chloride in a Solution.
Calculate the Mass of Cupric Nitrate in a Solution.
Calculate the mass of KPO4 in a Solution.
Calculate the mass of Sodium Hydroxide in a Solution.
Calculate the mass of Silver Nitrate in a Solution.
Calculate the Mass of Potassium iodate in a Solution.
Calculate the mass of Magnesium Chlorate in a Solution.
Calculate the mass of Lithium Sulfate in a Solution.
Calculate the mass of Potassium Bromide in a Solution.
Calculate the mass of PbCl3 in a Solution.
Calculate the mass of Potassium Iodide in a Solution.
Calculate the mass of Glucose in a Solution.
Calculate the mass of Ethanol in a Solution.
How to Calculate Concentration of Fe2(SO4)3 in Solution from [Fe3+]
Trigonometric Function Values
How to Calculate Temperature Change due to Heat of Solution
Solve For X when X is an Exponent
Word Problems and Systems of Equations
Solving Logarithmic Equations
Multiplication of Groups
Distributive Law - Multiplication and Addition of Groups
Distributive Property
Distributive Law - Multiplication and Addition of Groups
Distributive Law - Division and Addition of Groups
Fraction Simplification
Fraction Simplification
Fraction Simplification
Simplification
Simplification and Distribution
Simplification and Distribution
Simplification and Distribution
Solving an Equation
Solving an Equation
Solving an Equation
Word Problem - System of Equations
Word Problem - System of Equations
Exponent of a Quantity
Exponent of a Quantity
Exponent of a Quantity
Scientific Notation
Scientific Notation
Scientific Notation
Multiplication of Variables with Exponents
Multiplication of Variables with Exponents
Multiplication of Variables with Exponents
Scientific Notation
Scientific Notation
Scientific Notation
Scientific Notation & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation & Multiplication
Scientific Notation with Division & Multiplication
Scientific Notation with Division & Multiplication
Function Evaluation at a Point
Distributive Law
Solving an Equation
Solving an Equation with Fractions
Solving an Inequality
Multiply Quantities
Factoring a Polynomial
Solving a Quadratic Equation
Vector Magnitudes and Angles
Vector Magnitudes and Angles
Fraction Comparison
Solving a Quadratic Equation
Solving a Quadratic Equation
Solving an Equation with Fractions
Solving an Equation with Fractions
Solving an Quartic Equation
Probability
Probability
Probability
Probability
Basic Statistics
Graphing a Quadratic Function
Graphing a Linear Function with Intercepts
Determine the Slope Between Two Points
Parameters of a Parabola
Graphing an Exponential Function
Solve a System of Equations via Substitution
Solve a System of Equations with Addition
Function Minimization
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Reciprocal of a Decimal
Multiplication of Exponents
Multiplication of Exponents
Multiplication of Exponents
Division of Exponents
Division of Exponents
Division of Exponents
Solving an Equation
Multiplication, Distribution and Simplification
Multiplication, Distribution and Simplification
Addition of Fractions
Addition of Fractions
Addition of Fractions
Multiplication of Fractions
Multiplication of Fractions
Multiplication of Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Solving Equations with Fractions
Word Problems with Fractions
Squaring Quantities
Squaring Quantities
Squaring Quantities
Laws of Logarithms
Word Problems - Differences and Changes
What Does 15 1/3 - 7 1/2 Equal?
Derivatives: Quotient Rule
Find the Derivative
Find the Derivative
Find the Derivative
Implicit Differentiation
Limits
Related Rates
Implicit Differentiation
Implicit Differentiation
Limits
Limits
Limits
Limits
Related Rates
Limits
Physical Applications of Derivatives
Linear Approximation
Second Derivatives
Implicit Differentiation
Minimization
Related Rates
Maximization
Physical Applications of Derivatives
Related Rates
Physical Applications of Derivatives
Physical Applications of Derivatives - Maximum and Minimums
Physical Applications of Derivatives - Maximum and Minimums
Related Rates
Physical Applications of Derivatives - Maximum and Minimums
Physical Applications of Derivatives - Maximum and Minimums
Linear Approximation
Higher Order Derivatives
Second Derivatives
Second Derivatives
Function Domains
Limits
Tangent Lines
Definition of Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Find the Derivative
Tangent Lines
Implicit Differentiation
Physical Applications of Derivatives
Definition of Derivative
Tangent Lines
Higher Order Derivatives
Implicit Differentiation
Values of Derivatives
Values of Derivatives
Find the Derivative
Find the Derivative
Revenues and Profits
Find Derivatives using the Chain Rule
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Determine the integral
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Calculate the derivative
Hydroxide Concentration Calculation
pH Calculation from Partial Ionization
Chromic Acid Dissociation Calculation
Sulfur-35 Decay Rate Constant Calculation from Activity
Tritium Decay Constant Calculation from Decay Rate
Carbon-14 Decay Rate Constant Calculation from Half Life
Standard Gibbs Free Energy of Reaction Calculation
Molarity Calcuation from Mass and Volume
Moles Present in an Ideal Gas
Heat of Combustion Calculation
Diffusion Rate Calculation of O2 and SO3 With Root Mean Square
Heat Transfer Calculation
Density Calculation of an Ideal Gas
Quanta Calculation
Photon Energy Calculation from Frequency
Radiation Frequence and Wavelength Calculation from Photon Energy
I Quantum Number Calculation
MI Quantum Number Calculation from L
Balancing Redox Reactions in Acidic Solution
Redox Reactions in Acidic Solution
Balancing Redox Reactions in Acidic Solution
Balancing Redox Reactions in Acidic Solution
Redox Reactions in Basic Solution
Balancing Redox Reactions in Basic Solution
Redox Reactions in Basic Solution
Balancing Redox Reactions in Basic Solution
Redox Reactions in Basic Solution
Electrical Work Calculation of a Voltaic Cell
Calculating Work, Heat and Internal Energy Change of a Thermodynamic System
Entropy Calculation from Heat of Vaporization
Standard Entropy of Reaction Calculation with Sodium and Chlorine
Standard Entropy of Reaction Calculation with Silver and Chlorine
Standard Entropy of Reaction Calculation
Standard Entropy of Reaction Calculation with Methanol and Oxygen
Standard Gibbs Free Energy of Reaction Calculation with Ethene and Oxygen
Standard Gibbs Free Energy of Reaction Calculation with Calcium Carbonate in Acid
Calculate the Molar Mass of Potassium Permanganate (KMnO4)
How to Calculate the Molar Mass of Potassium Chloride (KCl)
How to Calculate the Molar Mass of Sodium Sulfate (Na2SO4)
How to Calculate the Molar Mass of Calcium Nitrate ( Ca(NO3)2 )
How to Calculate the Molar Mass of Aluminum Sulfate ( Al2(SO4)3 )
How to Calculate the Molar Mass of Ammonium Phosphate ( (NH4)3PO4 )
How to Calculate the Molar Mass of Copper Sulfate Pentahydrate
How to Calculate the Molar Mass of Magnesium Phosphate ( Mg3PO4 )
How to Calculate the Molar Mass of Zn(C2H3O2)2*2H2O
How to Calculate the Molar Mass of Zn3(PO4)2*4H2O
How to Calculate the Molar Mass of Bicarbonate, H2CO3
How to Calculate the Molar Mass of Hg2Cr2O7
How to Calculate the Molar Mass of Ba(ClO3)2
How to Calculate the Molar Mass of Fe2(SO3)3
How to Calculate Grams of Potassium Chloride Produced from Reaction of 2KClO
Grams of Hydrogen Needed for Reaction
Grams of Ammonia Produced from Reaction
Grams of Silver Chloride Produced from Reaction
How to Determine the Percent Composition of Each Element in Cupric Bromide
How to Determine the Percent Composition of Each Element in Sodium Hydroxide
How to Determine the Percent Composition of Each Element in Ammonium Sulfide
How to Determine the Percent Composition of Each Element in Dinitogen Disulfide
How to Determine the Percent Composition of Each Element in C3H8S
How to Determine the Percent Composition of Each Element in Glucose
How to Determine the Percent Composition of each Element in Strontium Nitrate
How to Determine the Percent Composition of Each Element in Mercuric Oxide
How to Determine the Percent Composition of Each Element in Sodium Sulfide
How to Determine the Percent Composition of each Element in Potassium Carbonate
How to Determine the Percent Composition of Each Element in Ethanol
How to Determine the Percent Composition of Each Element in 3-(Dimethylamino)propionitrile
How to Determine the Percent Composition of Each Element in Ethene
How to Determine the Percent Composition of Each Element in Magnesium Chloride
How to Determine the Percent Composition of Each Element in Ethylene Glycol
How to Determine the Percent Composition of each Element in Oleic Acid
How to Calculate the Molarity of a Potassium Bromide Solution.
How to Calculate the Molarity of a Magnesium Chloride Solution.
How to Calculate the Molarity of a Glucose Solution.
Calculate the Molarity of a Potassium Iodide Solution.
Calculate the Molarity of a Formic Acid Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a sulfuric Acid Solution.
Calculate the Molarity of a Sodium Hydroxide Solution.
Calculate the Molarity of an Aluminum Sulfite Solution.
Calculate the Molarity of a Lithium Sulfate Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a Ammonium Carbonate Solution.
Calculate the Molarity of a PbCl3 Solution.
Calculate the Molarity of a Potassium Bromide Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Potassium Iodide Solution.
Calculate the Molarity of a Sucrose Solution.
Calculate the Molarity of a Ethylene Glycol Solution.
Calculate the Molarity of an Ethanol Solution.
Calculate the Molarity of a Sodium Carbonate Solution.
Calculate the Molarity of a Nitric Acid Solution.
Calculate the Molarity of a Sodium Chloride Solution.
Calculate the Molarity of a Glucose Solution.
Calculate the Molarity of a Hydrochloric AcidSolution.
Calculate the Molarity of a Boric Acid Solution.
Calculate the Molarity of a Ferrous Chloride Solution.
Calculate the Molarity of a Sodium Nitrate Solution.
Calculate the Mass of Sodium Carbonate in a Solution.
Calculate the Mass of Sodium Chloride in a Solution.
Calculate the Mass of Cupric Nitrate in a Solution.
Calculate the Mass of Plumbous Nitrate in a Solution.
Calculate the Mass of Magnesium Carbonate in a Solution.
Calculate the mass of Sodium Oxide in a Solution.
Calculate the mass of Sodium Fluoride in a Solution.
Calculate the mass of Potassium Chloride in a Solution.
Calculate the mass of Calcium Chloride in a Solution.
Calculate the mass of Calcium Chloride in a Solution.
Calculate the mass of Lithium Fluoride in a Solution.
Calculate the mass of Sodium Iodide in a Solution.
Calculate the mass of Strontium Nitrate in a Solution.
Calculate the Mass of Sodium Carbonate in a Solution.
Calculate the Mass of Sodium Chloride in a Solution.
Calculate the Mass of Cupric Nitrate in a Solution.
Calculate the mass of KPO4 in a Solution.
Calculate the mass of Sodium Hydroxide in a Solution.
Calculate the mass of Silver Nitrate in a Solution.
Calculate the Mass of Potassium iodate in a Solution.
Calculate the mass of Magnesium Chlorate in a Solution.
Calculate the mass of Lithium Sulfate in a Solution.
Calculate the mass of Potassium Bromide in a Solution.
Calculate the mass of PbCl3 in a Solution.
Calculate the mass of Potassium Iodide in a Solution.
Calculate the mass of Glucose in a Solution.
Calculate the mass of Ethanol in a Solution.
How to Calculate Concentration of Fe2(SO4)3 in Solution from [Fe3+]
Trigonometric Function Values
How to Calculate Temperature Change due to Heat of Solution
Solve For X when X is an Exponent
Word Problems and Systems of Equations
Solving Logarithmic Equations
