Can you help: She Receives 2% for her sales up to $60,000. For the next $90,000 of sales, she is paid 3%, and for any sales above$150,000 she is paid 4%. How much commission would you earn in a month when sales were$195,000? 2nd part to ? Suppose that worth merchandise worth $195.000 but that 40.000 of that was later returned. what would be the commission of net sales?

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?