Adam needs to replace two concrete sections in his sidewalk, as modeled below. Each section is 36 inches by 36 inches and 4 inches deep. He can mix his own concrete for $3.25 per cubic foot.

f(x) has value 150 at x= 0

and 0 at x= 3

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

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

11

step-by-step explanation:

32.50-7.50=25

225/25=11

-1/4 > -1 2/3. -1/4 is greater than -1 2/3 because it is closer to 0 on the number line.