Answer:
A. 11.4
Step-by-step explanation:
![f(t) = P e^{rt}](https://tex.z-dn.net/?f=f%28t%29%20%3D%20P%20e%5E%7Brt%7D)
Data:
P = 7
r = 0.07
Calculation:
![\begin{array}{rcl}f(t) & = &Pe^{rt}\\f(7)& = & 7 e^{(0.07 \times 7)}\\ & = & 7 e^{0.49}\\& \approx & 7 \times 1.632\\ & \approx & \mathbf{11.4}\\\end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Brcl%7Df%28t%29%20%26%20%3D%20%26Pe%5E%7Brt%7D%5C%5Cf%287%29%26%20%3D%20%26%207%20e%5E%7B%280.07%20%5Ctimes%207%29%7D%5C%5C%20%26%20%3D%20%26%207%20e%5E%7B0.49%7D%5C%5C%26%20%5Capprox%20%26%207%20%5Ctimes%201.632%5C%5C%20%26%20%5Capprox%20%26%20%5Cmathbf%7B11.4%7D%5C%5C%5Cend%7Barray%7D)
344 pairs of athelic shoes were sold bc when f=688 double 344 bc its individual shoes
if u set up the equation f÷2 - 4 = 340 and u input f u get the answer.....hope this helped
The answer is 5.5.
hope this helps!!