Answer:
r = 72% = 0.72
Step-by-step explanation:
This case is a compound interest case. But the interest is accumulated negatively every week.
Total Amount Compounded with compound interest is calculated as
A = P (1 + r)ᵗ
P = principal/initial amount invested = $360
r = rate of increase weekly = -28% = - 0.28
t = time period that passes = t
A = 360 (1 - 0.28)ᵗ
A = 360 (0.72)ᵗ
Hope this Helps!!!