Question

PLEASE HELP!!!!
I WILL MARK BRAINLIEST!!!!

Answer 1

Ev = log2 (N2/t)
-3 = log2 (2^2/x)

log2(2^2/x)=-3
log2(4/x)=-3
4/x=2^-3 - Convert into exponential using log n(x) = b is equal to x= a^b
4/x = 1/2^3
4/x = 1/8
32 = x
Therefore, the exposure is 32 seconds