Answer:
81 hours
Step-by-step explanation:
Let x be the time are needed
45:5 = x:9
5x = 45×9
5x = 405
x = 81
Answer: 12s^2
you're welcome :D
-5
8
y=x, y=kx, k is a constant, k/x=y/x, k=y/x, k=24/3, k=8