Karl paints magnets. he earns $0.45 for each piece that he makes. how much will he earn this week if he made 85 on monday, 99 on tuesday, 109 on wednesday, 73 on thursday, and 93 on friday?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.

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?

Maria solved an equation as shown below. what is the solution to maria’s equation?