Question

Simplify the expression. 

Answer 1

⇒ 4³ × 4⁵
⇒ 4³⁺⁵
⇒ 4⁸

In short, Your Answer would be Option C

Hope this helps!

Answer 2

From the law of indices for multiplication:

yᵃ  ×  yᵇ =  yᵃ ⁺ ᵇ

So:

4³ × 4⁵ = 4³ ⁺ ⁵

           = 4⁸

Option C

I hope this explains it.

Cheers!