Answer:
Explanation:
Find out all of the combos of sums (2,3,5,9,3,4,6,10,4,5,7,11,5,6,8,12)
Then find out how many of these are divisible by 3 (6)
Count how many possibilities there are (24)
6/24=25%
a = 132 m/s^2
f(t) = t^4 − 2t^3 − 6t^2 + 9t
v = f'(t) = 4t^3 - 6t^2 - 12t + 9
a = f''(t) = 12t^2 - 12t -12
Substitute t = 4 seconds into the equation for a:
a = 12(16) -12(4) -12 = 132 m/s^2
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