Sylvie is going on vacation. she has already driven 60 miles in one hour. her average speed for the rest of the trip is 57 miles per hour. how far will sylvie have driven 7 hours later

Describe the domain and range of y=2(3)^x-2+5

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

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?