1)After a boulder is pushed down a hill, its speeds(t)at timettis given by the formulas(t)=v+at, wherevis the initial velocity andais the acceleration. Ifs(2)=16ands(5)=25, find the initial velocity and acceleration.(round to the nearest tenth)

2)

For a particular quadratic functionf(x)=ax2+bx+c

,f(3)=13f(3)=13andf(2)=7. Ifa=3, findbandc.

3)With the current, a person can canoe24miles in44hours. Against the same current, the same person can canoe18miles in6hours. Find the persons average rate in still water and the average rate of the current