I have two questions here.

1. Find area of region that lies under curve y=(3x+4)^{1/2 }over 0<x<4

(Those are less than or equal to signs)

2. It is estimated that t days from now a farmers crop will be increasing at the rate of .3t^{2}+.6t+1 bushels per day. By how much will the value of the crop increase during the next 5 days if the market price remains fixed at $3 a bushel?

If you can do step by step, I really don't understand this.