Note: Figure is not drawn to scale.

If a = 72 inches, b = 73 inches, c = 50 inches, and d = 68 inches, how much fabric is needed to make the tent?

A.

17,000 sq in

B.

17,562 sq in

C.

13,600 sq in

D.

26,280 sq in

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?