It cost Irene $58.90 to fill her car's gas tank with 15 and 1/2 gallon of gas. Select the rate that are equivalent to this. a
$3.76 for 2 gallons of gas
b
$3.80 for 1 gallon of gas
c
$3.82 for one gallon of gas
d
$3.73 for 2 gallons of gas

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?