At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 38 minutes and a standard deviation of 4 minutes. If you visit that restaurant 43 times this year, what is the expected number of times that you would expect to wait longer than 44 minutes, to the nearest whole number?

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?