Question
Braking distance The braking distance y in feetthat it takes for a car to stop on wet ,level pavement can be estimated by y = 1/9 x^2, where the x is the speed of the car in miles per hour Find the speed associated with with each braking distance.
(a.) 25 feet (b.) 361 (c.) 784
(a.) 25 feet (b.) 361 (c.) 784
Answers
Henry
Y = (1/9)(X^2) = X^2/9.
a. Y = X^2/9 = 25 ft.
X^2/9 = 25,
Multiply both sides by 9:
X^2 = 225,
X = 15 Miles/hr.
a. Y = X^2/9 = 25 ft.
X^2/9 = 25,
Multiply both sides by 9:
X^2 = 225,
X = 15 Miles/hr.
Henry
post it.