Question

Which of the fractions below has a numerator of 3? Select all that apply.

A)38


B)23


C)25


D)38


E)312

Answer 1

A and C

Explanation:

When you are dividing exponents you subtract. So for this problem -8 - -4 = -8 + 4 = -4. This means that the new exponent would be -4.

When you have a negative exponent, the equation is a fraction. As an example x^-5 would be equal to 1/x^5. For this equation, since you know that the new exponent is -4, an equivalent equation would be 1/3^4.

Hope this helps