11. Doreen lives mile from the library. Sheila lives as far away from the library
as Doreen. For lla-llc, choose Yes or No to answer each question.
11a. Does Doreen live farther from
the library than Sheila?
O Yes
• No
11b. Does Sheila live mile from
the library?
O Yes
Ο Νο
11c. Does Sheila live twice as far from
the library than Doreen?
O Yes
Ο Νο

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?