If postage costs are 22 cents for the first ounce and 17 cents for each additional ounce, what is the cost of postage for a letter weighing 3 ounces?

How do you write y-10=2 (x-8) in standard form

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?

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?