Vin completes laps of a cycle track with the times shown in the table. Each lap is 250 metres (m). Time (seconds) Lap number Lap Lap 2 Lap 3 32.14 31.94 31.68 31.89 32.14 32.71 Lap 4 Lap 5 Lap 6 Lap 7

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?