Help help help help help me and please explain

x^3 = 27

4^x = 64

x^4 = 81

Step-by-step explanation:

you replace x with 3

x^3 = 3^3 = 3 * 3 * 3 =27

4^x = 4^3 = 4 * 4 * 4 =64

x^4 = 3^4 = 3 * 3 * 3 * 3 = 81

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)