Please answer ASAP WILL GIVE BRAINIEST (PLEASE NO SPAM ANSWERS) A train full of giraffes and rabbits goes to a resort. In every train car, there are either
25 giraffes or 45 rabbits. The total number of giraffes on the train is equal to the total
number of rabbits on the train. What is the least possible number of train Cars if there
are more than 500 animals on the train?

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?