Which sets of measurements could be the side lengths of a triangle? Select each correct answer.

(A) 3 cm, 3 cm, 3 cm
(B) 4 cm, 8 cm, 13 cm
(C) 5 cm, 9 cm, 14 cm
(D) 6 cm, 7 cm, 8 cm
(E) 7 cm, 7 cm, 10 c

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?