Yuki weighted several soil samples, each filling a quarter liter measuring cup. The distribution of masses has a mean of 215g and a standard deviation of 60g. After recording her measurements, Yuki realized that she had forgotten to subtract the mass of the measuring cup, which is 20g. What will be the mean and standard deviation of the distribution of corrected measurements?

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?