Answer :
Answer:
So, f(3) is approximately equal to 95.61336424
Step-by-step explanation:
Let’s calculate the derivative:
f’(t) = 0 + 42 * (-1/28) * e^(-t/28)
= -1.5 * e^(-t/28)
So, the derivative of the function 57 + 42e^(-t/28) is -1.5 * e^(-t/28).
Now, to find f(3), we substitute t = 3 into the function:
f(3) = 57 + 42e^(-3/28)
To get the exact numerical value, we need the specific value of e, but let’s simplify it in terms of e:
f(3) ≈ 57 + 42 * 0.89483932
