The function f(x) = 8√x gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). Find the speed of the object after it has fallen 31 feet. If necessary, round your answer to the nearest tenth.

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

12*c

step-by-step explanation:

the answer is b.

surface area: 169π

volume: 366π

i got it down.