Algebra 2P 3rd Quarter Benchmark Review (2021) y 8) China is swinging on a swing. Her maximum height above the ground is 12 feet and her minimum height above the ground is 2 feet. Give an equation that models China's height above the ground (y) after x seconds of swinging assuming that the x-axis represents the ground​

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?