1. A taxi company in Iowa charges a flat rate of $5.00 for the first mile, then $0.80 per mile for each successive mile until the total distance traveled is 10 miles.After 10 miles, the rate drops down to $0.50 per mile.The taxi drivers will not accept trips over 15 miles in length.

-Define a piece-wise function to represent the cost of an -mile taxi ride.

2.One leg of a right triangle is 7cm shorter than the other leg.How long should the shorter leg be to ensure that the hypotenuse is at least 13cm?