Question

I really need help with this one because I have a big test soon

Answer 1

the first selection

Explanation:

x^-1 equals to 1/x

10^-7 = 1/10^7

= 1/10 x 1/10 x 1/10 x 1/10 x 1/10 x 1/10 x 1/10

Answer 2

the correct answer is the first one.

Explanation:

When we see a negative exponent, it tells us how many times to multiple the reciprocal of the base. In this case the base is 10 so its reciprocal would be 1/10. We would multiple the reciprocal of 10 (1/10) 7 times.