Leia and Thaddeus are reading the same 225-page book. Leia starts reading the book and plans to read 25 pages a day. Thaddeus has already read 45 pages and is reading 20 pages a day. Determine if each
statement is True or false.

(T/F)Leia will finish the book in 9 days.

(T/F) f(x) = 20x represents the number of pages
Thaddeus has read in x days.

(T/F)They will both finish the book in 9 days.

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?