Jenna rents 4 identical storage lockers. Each locker is shaped like a cube. The four lockers are arranged in a row, as shown.
s = length (ft) of one side of a locker
S
Which expression represents the total
volume of all four lockers?

-

What is the total volume of all four lockers
if one side of a locker is 2 feet long?

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?