You get in your car with the intention of driving from Tucson to Phoenix ( 114 miles West of Tucson ) . Unfortunately, you were distracted when getting on to the highway and manage to drive in the opposite direction, going East instead of West. You only realize your mistake after arriving at Willcox, AZ (83 miles east of Tucson) . You immediately turn around and drive back through Tucson until you finally reach Phoenix . The entire trip takes 4 hours and 6 minutes to complete . Determine the magnitude of your average velocity during this entire trip .​

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

What is the value of x in the equation7x+2y=48 when y=3

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?