2.) During typhoon ambo PAGASA tracks the amount of the accumulating rain fall. For the first three hour's of typhoon that rain fell at a constant rate of 25 mm per hour. The typhoon slows down for an hour ad started again at a constant rate of 20 mm per hour for the next 2 hour's . Write a piecewise function that models the amount of rain fall as function of time. (this is for a friend)

Step-by-step explanation:

Given that :

First 3 hours, rain fell at a constant rate of 25mmper hour

Next one hour, tmrain slowed down

Next 2 hours, rate of 20mm per hour

Piecewise function which models the situation :

{25t ; t in range {0, 3)

f(x){75 ; t in range {3,4}

{75 + 20(t-4) ; t in range {4,6}

Hence, the function.

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees