How do you solve 16 as a power of 2?

Answer 1

In this case, trial and error is probably the easiest:

22 = 4, 23 = 8, 24 = 16 yes!

A more genral answer is:

the power that you want is log(16)/log(2) where the logarithm is calculated to any base (10 or e , or indeed any other).

Answer 2

16 can be expressed as a power of 2 by determining the exponent to which 2 must be raised to obtain 16. In this case, 2^4 equals 16, so 16 can be written as 2^4.