physics
posted by Hannah .
n boat starts from rest and accelerates at a constant rate to a final speed of 28 m/s over a distance of 780 m. How much time will this take?

Vf^2=Vi^2+2ad
solve for a, then..
28=at solve for t. 
actually, there is an easier way. Avg velocity is 14m/s
time to travel= distance/avgvelocity