If f(x) varies directly with x^2, and f(x) = 75 when x = 5, find the value of f(8). 192 256 25 40

The correct answer option is 192.

Step-by-step explanation:

We know that f(x) varies directly with so we can write it as:

∝

Changing it to an equality by the addition of a constant :

If f(x) = 75 when x = 5, then we can find the value of k:

If k = 3, we can find the value of f(8):

192

i think its a and d

step-by-step explanation: