A ball is thrown from the top row of seats in a stadium. The function h(t) = -1682 + 64+ + 284 gives the height, in feet, of the ball t seconds after it is thrown. How long will it be before the ball hits the ground? Round
your answer to the nearest tenth.

Solve this problem! extra ! 3025/5.5 = a/90.75

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

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?