• #### Bulk Modulus

##### Science›Physics›Solids, Liquids and Gases
How substances behave when their volume is compressed.
• #### Mass-Energy Equivalence

##### Science›Physics›Nuclear Physics
An explanation of mass energy equivalence.

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• #### Inverse Variation - Concept

##### Math›Algebra›Linear Equations and Their Graphs
How to tell if two variables vary inversely.
• #### Curve Sketching with Derivatives - Problem 4

##### Math›Calculus›Applications of the Derivative
How to evaluate the limit of a function at points where it is not continuous.
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• #### Area and Perimeter of Triangles - Problem 2

##### Math›Pre-Algebra›Introductory Geometry
Finding the area and perimeter of composite shapes that contain triangles
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• #### Direct Variation - Problem 2

##### Math›Algebra 2›Functions
How to solve an applied direct variation problem.
• #### Polygon Angle Sum - Problem 3

##### Math›Geometry›Polygons
How to apply the polygon angle sum theorem when you need to solve for x.
• #### The Circle - Problem 2

##### Math›Precalculus›Equations of Lines, Parabolas and Circles
How to find the center and radius of a circle given an equation.
• #### Polynomial Function - Problem 8

##### Math›Algebra 2›Polynomials
Find the polynomial with given imaginary binomial zeros and use one given point to find the value of the leading coefficient.
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• #### Derivatives of Logarithmic Functions - Problem 3

##### Math›Calculus›The Derivative
How to use the change of base formula to compute the derivative of log functions of any base.
• #### Solving Two-step Equations - Problem 5

##### Math›Algebra›Solving Equations
Solving equations where the variable is on the right hand side of the equals sign
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• #### Solving Equations with Decimals - Problem 2

##### Math›Pre-Algebra›Decimals and Percents
Solving equations with addition or subtraction of decimals
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• #### Properties of Logarithms - Problem 1

##### Math›Precalculus›Exponential and Logarithmic Functions
How to evaluate logarithms (using the properties of logs) when you have one value given.
• #### Graphing Radical Equations using a Table - Problem 5

Considering the domain to graph a radical function from a table of values.
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• #### Rate Word Problems - Problem 4

##### Math›Algebra›Word Problems Using Systems of Equations
Setting up a system of equations to solve a windspeed or current speed word problem
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• #### Multiplying Complex Numbers - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to multiply two complex numbers in trigonometric form.
• #### Derivatives of Logarithmic Functions - Concept

##### Math›Calculus›The Derivative
How to infer the derivative of the natural log function using a calculator investigation.
• #### The Euler Formula - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to use the Euler Formula to convert a complex number from the exponential form to rectangular form.
• #### Dividing Polynomials using Long Division - Problem 6

##### Math›Algebra 2›Polynomials
Using zeros as placeholders in long division where some coefficients of the dividend are zero.
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