Janine and her brother had a total of $35.19 to buy school supplies. Janine's school supplies cost %12.78. Her brother's school supplies cost slightly more than $9. About how much money did they have left after buying school supplies?

f(x) has value 150 at x= 0

and 0 at x= 3

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

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: