Beth ran a 400 meter
dash in 57.2 seconds.
this was 2.4 sec
faster than her
...
Mathematics, 05.10.2019 13:00 pierrezonra
Beth ran a 400 meter
dash in 57.2 seconds.
this was 2.4 sec
faster than her
previous time. what
was her previous
time?
(with equation)
Answers: 1
Mathematics, 21.06.2019 20:50
In the diagram, gef and hef are congruent. what is the value of x
Answers: 1
Mathematics, 21.06.2019 21:50
Which rule describes the composition of transformations that maps ajkl to aj"k"l"? ro. 900 o to, -2(x, y) to, -20 ro, 900(x, y) ro, 9000 t-2. o(x,y) t-2, 00 ro, 900(x, y)
Answers: 2
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
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