Mathematics, 07.06.2021 07:40 Sashakimora2020
Desde la azotea de un edificio se lanza una piedra con un ángulo de 30grados con respecto a la horizontal y con una velocidad inicial de 20metros sobre segundo si la altura del edificio es de 45 metros calcular cuánto tiempo permanece l piedra en el aire cual es la velocidad de la piedra justo antes de golpear el suelo
Answers: 2
Mathematics, 21.06.2019 21:10
Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)
Answers: 1
Mathematics, 21.06.2019 23:00
Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1
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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