There are 120 Gr. a students at a local high school and
40% of these students went to the school basketball game.
The full price for a ticket was $5.00 but if you wore
School colours you paid only half price. Half of the Gr. 9 students whonattendes the game wore school colors. What was the total amount of money collected from the Grade 9 students? Show your thinking.

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?