the formula r=2√5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet how far will a car skid at 70 mph?

Question

anonymous · Answer

245

anonymous · Answer

L=5*(r/2)^2

jim_thompson5910 · Answer

$$\large r=2\sqrt{5L}$$


$$\large 70=2\sqrt{5L}$$


$$\large \frac{70}{2}=\sqrt{5L}$$


$$\large 35=\sqrt{5L}$$


$$\large 35^2=5L$$


$$\large 1225=5L$$


$$\large \frac{1225}{5}=L$$


$$\large 245=L$$


$$\large L=245$$
So the car will skip 245 ft.

jim_thompson5910 · Answer

lol oops meant to say skid instead of skip, that's one hopped up car