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.