Mathematics, 19.01.2021 14:00, dimontsho4717
Amelia wants to buy 6 sausage Rolls. Each sausage rolls costs 84p. Amelia pays with a £20 note. Work out how much change Amelia will get from £20.
Answers: 1
Mathematics, 22.06.2019 00:00, xXwolfieplayzXx
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
Amelia wants to buy 6 sausage Rolls. Each sausage rolls costs 84p. Amelia pays with a £20 note. Work...
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