A student reads that a 95% confidence interval for the proportion of incoming freshmen at Highly Competitive University who were valedictorians of their high school graduating class
is given by (0.24. 0.29) based on a random sample of incoming freshmen. When asked to
explain the meaning of the interval, the student says, "I know that between 24% and 29% of
all incoming freshmen were valedictorians." Is the student correct? Explain.

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?