Match the reasons to the statements given. given: abcd ef contains t prove: et = ft 1. parallelogram abcd vertical angles are equal. 2. cpcte 3. 1 = 2 if lines parallel, then alternate interior angles are =. 4. diagonals of a parallelogram bisect each other. 5. 3 = 4 asa 6. triangle bet congruent to triangle dft definition of parallelogram. 7. given

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?