The maximum gas mileage for a compact car is estimated using the graph shown below.
the average gas mileage for an suv is modeled by the function m(s)=−0.015(s−55)2+15, where s is the suv's speed in miles per hour.
the difference in maximum mileage between these two vehicles is mpg (miles per gallon).
enter the number that correctly fills in the blank in the previous sentence.

The graph's maximum is at 33 mpg for reference −0.015(x−55)2+15so just plug it inlet's set y to 0

y=−0.015(x−55)2+15 0=−0.015(x−55)2+15 subtract 15 −15=−0.015(x−55)2 divide both sides by -0.015 1000=(x−55)2
the other maximum is at x=55
and we want the y value
at x=55, y=-0.015(55-55)^2+15 y=-0.015(0)+15 y=15
 the compact has a max of 33mpg and the SUV 15mpg

so you would subtract the 33 and the 15

Ithink if im not mistaking b is -3 but im not a 100% sude