High School Math : Pre-Algebra

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #1 : How To Find The Volume Of A Sphere In Pre Algebra

What is the volume of a sphere with a radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for the volume of a sphere is .

Plug in our given values.

Example Question #8 : How To Find The Volume Of A Sphere In Pre Algebra

If the volume of a sphere is , what is the radius?

Possible Answers:

Correct answer:

Explanation:

The formula for volume of a sphere is .

Plug in our given information.

Notice that the 's cancel out.

Divide both sides by . Since we're dividing by a fraction, that means we need to multiply both sides by the reciprocal: .

Example Question #3 : How To Find The Volume Of A Sphere In Pre Algebra

What is the volume of a sphere with a radius of ?

Possible Answers:

Correct answer:

Explanation:

To solve for the volume of a sphere you must first know the equation for the volume of a sphere.

The equation is

 

Then plug the radius into the equation for  yielding

 

Then cube the radius to get

 

Multiply the answer by  and  to yield .

The answer is .

Example Question #10 : How To Find The Volume Of A Sphere In Pre Algebra

What is the volume of a sphere with a radius of ?

Possible Answers:

Correct answer:

Explanation:

To solve for the volume of a sphere you must first know the equation for the volume of a sphere.

The equation is

Then plug the radius into the equation for  yielding 

Then cube the radius to get 

Multiply the answer by  and  to yield

.

The answer is .

Example Question #11 : How To Find The Volume Of A Sphere In Pre Algebra

What is the volume of a sphere with a radius of ?

Possible Answers:

Correct answer:

Explanation:

To solve for the volume of a sphere, use the equation:

Substitute the given radius into the equation:

Example Question #1 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify the exponential expression below.

Possible Answers:

Correct answer:

Explanation:

The power rule of exponents states that when an exponential term is raised to another power, we multiply the exponents to simplify.

Example Question #2 : How To Use The Power Rule For Exponents In Pre Algebra

What is the value of ?

Possible Answers:

Correct answer:

Explanation:

The power rule says that an exponent to the power of another exponent gets multiplied.  We can think of  as , in which case we see that the answer is  because multiplying the same numbers with different exponents adds the exponents.

Example Question #3 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify .

Possible Answers:

Correct answer:

Explanation:

When raising a polynomial to a power you multiply the polynomial inside the parentheses by the power outside of the parentheses.

If you think about it is equivalent to 

So we multiply  by  to get the power of the answer 

The answer is .

Example Question #4 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify the expression.

Possible Answers:

Correct answer:

Explanation:

The power rule of exponents states than an exponential term raised to another exponent can be simplified by multiplying the exponents together.

Example Question #5 : How To Use The Power Rule For Exponents In Pre Algebra

What is  simplified?

Possible Answers:

Correct answer:

Explanation:

When raising a polynomial to a power you multiply the polynomial inside the parentheses by the power outside of the parentheses.

So we multiply  by  to get the power of the answer as .

The answer is .

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