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Mathematics, 25.09.2019 13:30 anna40794
Angie and kenny play online video games. angie buys 1 software package and 3 months of game play. kenny buys 1 software package and 2 months of game play. each software package costs $20. if their total is $115, what is the cost of one month of game play?
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Mathematics, 22.06.2019 00:00
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?
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Angie and kenny play online video games. angie buys 1 software package and 3 months of game play. ke...
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