PLS HURRY. I HAVE A ZOOM CLASS SOON! Stan sells mangoes in boxes of 10. One day he sells 5 boxes of mangoes in the morning and 12 boxes of mangoes in the evening. Create an expression that can be used to determine how many more mangoes Stan sold in the evening than in the morning.

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?