Which statements about the graph of the function f(x) = -x2 - 4x + 2 are true? Select three options. The domain is {x|x S-2}.
The range is yly s6}.
The function is increasing over the interval (_0,-2).
The function is decreasing over the interval (-4, 00).
The function has a positive y-intercept

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?