Posted by lisa on .
The function f(x)=5 square root of x gives the speed in feet per second (ft/s) of a freefalling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the nearest tenth.

algebra1 HELP PLEASE Thanks you!! 
MathMate,
Not sure if there is a typo in your question, the speed is
y(x)=5√(x)=5√(25)=25
This corresponding an equivalent acceleration approximately that of Mars.