The u. s. food and drug administration (fda) performed a study that compared the carbohydrate content (as a percentage of weight) of several major brands of corn and potato chips. fourteen brands of corn chips were sampled and 14 brands of potato chips were sampled. data was collected and the following 95% confidence interval was computed for the difference in means. intrepret the 95% confidence interval for the difference in the mean carbohydrate content between the corn chip and potato chip groups.

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?