Mathematics, 28.01.2021 18:10, dixks
Fifty people are in a room. Thirty- four of them are married. There are twenty men in the room, six of whom are not married. How many women in the room are not married?
Answers: 3
Mathematics, 22.06.2019 00:00, nshadow2920
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?
Answers: 3
Fifty people are in a room. Thirty- four of them are married. There are twenty men in the room, six...
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