Solve the problem.
-The formula $\mathrm { v } = \sqrt { 20 \mathrm {~L} }$ can be used to estimate the speed of a car, $\mathrm { v }$, in miles per hour, based on the length, L, in feet, of its skid marks upon sudden braking on a dry asphalt road. If a car is involved in an accident and its skid marks measure 45 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
A) 25 mph
B) 40 mph
C) 30 mph
D) 35 mph

Question

Quizplus · Accepted Answer

To find the estimated speed, substitute $L = 45$ feet into the formula: $v = \sqrt{20 \times 45}$. Simplifying gives $v = \sqrt{900}$, which equals 30. Therefore, the estimated speed was 30 mph.

Solve the Problem v=20 L\mathrm { v } = \sqrt { 20 \mathrm {~L} }v=20 L​

Solve the Problem $\mathrm { v } = \sqrt { 20 \mathrm {~L} }$