Michelle was driving to and from work one day. The time it took to drive home was ten minutes less than twice the time it took to drive to work. If t represents the amount of minutes it took Michelle to drive to work, then write an expression in terms of t for the amount of minutes it took Michelle to drive home from work. [2 points] If the average time Michelle spent in her car on the way to and from work was 43 minutes, determine the amount of time, in minutes, it took her to get to work.

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?