Which of the following expressions is incorrect?
|-12| = 12
-|-12| = -12
-|12| =...
Mathematics, 24.09.2019 14:30 ayoismeisjjjjuan
Which of the following expressions is incorrect?
|-12| = 12
-|-12| = -12
-|12| = 12
|12| = 12
Answers: 2
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What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie
Answers: 2
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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
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