Can someone please check my math questions? My answers are under the questions... I would really appreciate any help
16. A car’s speed before a sudden stop can be estimated by the formula
S = √(30gk) , where
S = speed of the car in mph,
g = drag factor, and
k = length of skid mark in feet.
The drag factor during a recent crash was 0.8. What was the approximate speed of the car if it created skid marks 93 feet long?
a. 34 mph
b. 47 mph
c. 68 mph
d. 85 mph
Answer~ d

Question

Can someone please check my math questions? My answers are under the questions... I would really appreciate any help 
16. A car’s speed before a sudden stop can be estimated by the formula 
S = √(30gk) , where 
S = speed of the car in mph, 
g = drag factor, and 
k = length of skid mark in feet. 
The drag factor during a recent crash was 0.8. What was the approximate speed of the car if it created skid marks 93 feet long? 
a. 34 mph 
b. 47 mph 
c. 68 mph 
d. 85 mph 
Answer~ d

dayakar · Answer

$$s=\sqrt{30\times0.8\times93\times2.7meters}$$

abbycross167 · Answer

I got 77.6298911503 what did I do wrong?

anonymous · Answer

you divided wrong @abbycross167

abbycross167 · Answer

Oh okay,  how do I need to divide?