the commission earned on the sale of a car can be represented by the equation c(P)=250+0.02 where c represents the commission and p represents the purchase price of the car. a jack sold two cars last weekend one for $15,075 ant the other for $21,640 find his total commision. b if c(p)=745.80, find the purchase price of the car.

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?