Angel and his children went into a grocery store and where they sell peaches for $0.75 each and mangos for $1.25 each. angel has $15 to spend and must buy no less than 12 peaches and mangos altogether. if angel decided to buy 6 mangos, determine all possible values for the number of peaches that he could buy. your answer should be a comma separated list of values. if there are no possible solutions, submit an empty answer.

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?