Question

. What is the value of expression? 5^−8 • 5^−4.

A. 532
B. 54
C. 5−4
D. 5−12

Answer 1

The Value of Expression is: C.5-4
BECAUSE 5(-8+-4)
5(-8+4)
5-4

Answer 2

You use the formula
`a^(b) * a^(c) = a^(b+c)`

`5^(-4) * 5^(-8) = 5^(-4+(-8)) = 5^(-8-4) = 5^(-12)`

The right answer is D. 5−12.