Problem $3$: Determine the lowest gear reduction ratio $($fill in the blanks$)$

A rear$-$wheel$-$drive car weighs $3900$ lb $,$ has $15-$inch radius wheels, a driveline efficiency of $95\%$ and an engine that develops $520ft-lb$ of torque. Its wheelbase is $8\mathrm{.}2$ ft and the center of gravity is $18$ inches above the road surface and $3\mathrm{.}3$ ft behind the front axle. What is the lowest gear reduction ratio that would allow this car to achieve the highest possible acceleration from rest on good, dry pavement? Pay close attention to the units and all answers must be rounded to two decimals.

Fmax$=$ lbs

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