Mathematics, 22.02.2021 17:00 leriscepowell9004
seven years ago beths son was one third her age at the time. seven years from now he will be one half her age. how old is beth's son
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Mathematics, 21.06.2019 17:00
Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?
Answers: 2
Mathematics, 21.06.2019 23:30
The product of sin 30 degrees and sin 60 degrees is same as the product of
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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
seven years ago beths son was one third her age at the time. seven years from now he will be one hal...
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