Solve the problem.
-The distance in feet it takes a car traveling at x mph to come to a full stop after hitting the brakes is given by $1.28 \mathrm { x } ^ { 2 } + 0.056 \mathrm { x }$ Find the stopping distance for a speed of 40 mph. Round to the nearest foot.
A)2041 ft
B)2 ft
C)2070 ft
D)2050 ft

Question

Quizplus · Accepted Answer

Substitute x = 40 into the formula: $1.28(40)^2 + 0.056(40)$. This equals 2048 + 2.24 = 2050.24, which rounds to 2050 ft.

Solve the Problem 1.28x2+0.056x1.28 \mathrm { x } ^ { 2 } + 0.056 \mathrm { x }1.28x2+0.056x

Solve the Problem $1.28 \mathrm { x } ^ { 2 } + 0.056 \mathrm { x }$