Question

Select all that are equal to 5^3 x 5^-7

1/5^-4
1/5^4
5^-4
5^4
1/-625

Answer 1

5^-4

1/-625

Explanation:

5^3 x 5^-7

They have the same base is 5, which means we just need to add the root, so 3 + (-7) = -4, so the answer is 5^-4

5^ -4

5 times 5 times 5 times 5 = -625

Because it is a negative exponent, means it is a fraction. So, the answer is

1/ -625