The shelf life of a particular snack chip is normally distributed with a mean of 180 days
and a standard deviation of 30 days.
About what percent of the products
last between 150 and 210 days?
About what percent of the products
last between 180 and 210 days?
About what percent of the products
last less than 90 days?
About what percent of the products
last more than 210 days?

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Hundred and tens tables to make 430 in five different ways

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?