Two right circular cylinders have equal volume. the first cylinder has a radius of 6 inches and a height of 12 inches. what is the number of inches in the height of the second cylinder if its radius is 8 inches? express your answer as a common fraction, without units.

Which function is represented by the graph

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that 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?