Answer:
The person bikes 20 miles in an hour.
5(0.85)t < 1.5 is 15% decay
50(1.05)t < 100 is 5% growth
150(1.50)t > 500 is 50% growth
50(1.15)t < 150 is 15% growth
83.7 m
18.6 / 3.6 = 5.166667
16.2*5.166667 = 83.7 m
By definition of conditional probability,
P(B | A) = P(A ∩ B)/P(A) = (13/25) / (13/20) = 20/25 = 4/5