Answer:
15
Step-by-step explanation:
First, 4 people know the post
Then, those 4 people share it each with 4 people (4 * 4 = 16)
Then, each of those people share it with another 4 people (16 * 4 = 64)
And so on. the function is as simple as: 4^x (4 to the power of x)
C and d
when x = 2 , f(x) = x^2 = 4
and
when x = 1 f(x) = 5
I believe the answer is Monday!