Simplify 4 to the power of 7 multiplied by 9 to the power of 7.

A. 13 to the power of 14.

B. 13 to the power of 7.

C. 36 to the power of 7.

D. 36 to the power of 14.

I've never learned how to do this

hmm

let's experiment with similar thing

wait, I can reverse a known thing

(ab) ^n = (a^n) (b^n)

so

(4^7) (9^7) = (4*9) ^7 = (36) ^7

answer is C