HELPPP
WHATS 21+1/5r the r=-1/2

-8.8

Step-by-step explanation:

First step:

plug in the r so that 21+1/5(-1/2)

second step:

solve the problem so that the problem is now 22/-2.5

third step:

finally you then have to divide 22/-2.5 which is equal to -8.8

hope this helps :)

f(x) has value 150 at x= 0

and 0 at x= 3

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

the answer is two. hope this !