My answer is C, I don’t think I’m going to need Brainly that much since we won’t have school work but I’ll use it to help others.
Answer:
264
Step-by-step explanation:
well you could have just used a calculator!
Take into account, that in general, a cosine function of amplitude A, period T and vertical translation b, can be written as follow:

In the given case, you have:
A = 4
T = 3π/4
b = -3
By replacing you obtain:

Hence, the answer is:
f(x) = 4cos(8/3 x) - 3