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Mathematics, 21.06.2019 17:30
James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum
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Mathematics, 21.06.2019 22:30
Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.
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Mathematics, 21.06.2019 23:40
Let x = a + bi and y = c + di and z = f + gi. which statements are true?
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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?
Answers: 3
Write 14,000,000,000 in powers of 10...
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