You have a babysitting job after school that pays 7.25 per hour. Your earn twice as much per hour working as a library assistant. you have time to work at most 20 hours per week, and you must work at least 5 hours at the library each week. you want to make at least 100$ a week. what is a graph showing how many hours you can babysit and work at the library

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?