1 2.7.3 Quiz: Ratios and Proportions Question 1 of 9
An old house in Boxerville measures 40 feet in height and has windows 5-feet
in width. An architecture student builds a proportional model that is 6-feet
high. How wide are the model's windows, in feet?
Answer here
SUBMIT

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?