SOLUTION: On a dry asphalt road, a car’s stopping distance varies directly as the square of its speed. A car traveling at 45 miles per hour can stop in 67.5 feet. What is the stopping dis

Algebra ->  Equations -> SOLUTION: On a dry asphalt road, a car’s stopping distance varies directly as the square of its speed. A car traveling at 45 miles per hour can stop in 67.5 feet. What is the stopping dis      Log On


   



Question 1138651: On a dry asphalt road, a car’s stopping distance varies directly as the square of its speed.
A car traveling at 45 miles per hour can stop in 67.5 feet. What is the stopping distance
for a car traveling at 60 miles per hour?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Set up a direct relation with a constant
of proportionality, +k+
+d+=+k%2As%5E2+
+67.5+=+k%2A45%5E2+
+k+=+67.5%2F2025+
+k+=+.0333+
---------------------------
+d+=+.0333%2As%5E2+
+d+=+.0333%2A60%5E2+
+d+=+120+ ft