Which interval contains the median number of cars in line?
Drivers pay a toll to pass over a busy bridge, and there
are many toll booths that collect money. The city
manager counted the total number of cars waiting to pay
their tolls at 15-minute intervals during the day for a total
of 50 observations. The histogram below shows the
results.
0 10-20 cars
020-30 cars
O 30-40 cars
40-50 cars
Bridge Toll Booth Traffic

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?