4. Your realized income from your primary job is $2,034.24/month. Your fixed expenses are 30% (1 po of your primary job's realized income. You have a second job that pays $9.50/hr with
deductions of FICA (7.65%), federal tax withholding (11.5%), and state tax withholding
(7.75%). If you want to save enough in the next 10 months to have an emergency fund that
will cover 5 months using only 20% of your discretionary monies from your primary job, how
many hours per month do you need to work at your second job to meet your monthly savings
goal?
hr/month

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?