Mathematics, 08.01.2022 07:10, pmckain

A train takes 1 hour to travel 75 miles. How long will it take the train to travel 450 miles?

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Mathematics, 21.06.2019 14:30, purpletart41

Arrange these numbers from least to greatest 3/5 5/7 2/9

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Mathematics, 21.06.2019 20:30, nosugh

If m∠abc = 70°, what is m∠abd? justify your reasoning. using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°. using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°. using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality. using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

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Mathematics, 21.06.2019 22:00, Treezy11

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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?