Question

What is the value of k in the product of powers below?

10^-3 x 10 x 10^k = 10^-3 = 1/10^3

A. -3
B. -1
C. 0
D. 1

Answer 1

Answer: -1

Explanation:

Answer 2

B. -1.

Explanation:

Note: 10 = 10^1 so:

10^-3 x 10 x 10^k = 10^(-3 + 1 + k) = 10^(k - 2).

So 10^(k - 2) = 10 ^(-3)

and k - 2 = -3

k = 2 - 3 = -1.