Select the correct choice below and fill in the answer box(es) to complete your choice. (Type a whole number.)
A. 312÷75=?
B. 312÷75=? R ?
IN the answer B the reason why i put an R there is because they are also asking for the remainder and also plz take ur time on this and don't rush bc i'm in no rush at all and PLZ DONT JUST BE HERE FOR POINTS.! And also when ur done don't be scared to ask me if i could help u on ur questions to bc i would LOVE TO help anyone. Bc that's what this app is for! Have an wonderful day loves! <3

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?