Question

Evaluate 5^28·5^-32·5^-4
A. 17,920
B. 0.017920
C. 0.000256
D. 0.00000256

Answer 1

B. 0.000256

Explanation:

5^28 . 5^- 32 . 5^ -4

= 5^( 28 - 32 - 4 )

= 5^( 28 - 36 )

= 5^- 8

= 1 / 5^8

= 1 / 390625

= 0.000256

Answer 2

D 0.00000256

Explanation:

`5^(28) *5^(-32)*5^(-4)=5^(28-32-4)=5^(-8)=(1)/(5^(8)) =0.00000256`