Addison paid $1.29 for gum and $0.89 for a package of notebook paper . she gave the cashier a $5 bill. if the tax was $0.14, how much change should addison receive?

If 3x+8=3x+8 is it one solution or no solution

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

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?