Can someone please help me with 1, 2, and, 3?

Step-by-step explanation:

I will not provide the answer.

You should do it yourself.

Just remember that the sum of all the angles of a triangle is 180 degrees.

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50