The Smith family went out to dinner. • The price of the meal was $29.85.
• The sales tax was 6% of the price of the meal.
The tip was 15% of the meal and the sales tax.
How much money did the Smith family pay for the meal, including tax and tip?
A $50.85
B$36.39
$36.12
$31.95

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?