Answer:
I'm guessing you want a word problem that answers this?
Step-by-step explanation:
The length of a rectangle is 8 cm more than 3 times its width.
When the penny hits the ground, h will = 0.
So: Set h(t) = 0 = -4.9t^2 + 0t + 150 m
Then 4.9t^2 = 150, and so t^2 = sqrt(150 / 4.9) = plus or minus 5.53 sec.
We can use only the positive root, as we're measuring time.
t = 5.5 sec (answer)
7 is length and 5 is width. Hope this helped!!