The table shows the percentage of students in each of three grade levels who list soccer as their favorite sport. Soccer
Sophomores
(35%)
50%
Juniors (33%) 45%
Seniors (32%) 30%
+
+
Total (100%)
(0.5/0.35) + (0.45/(0.33) + (0.32X0.3) =
0.4195 or about 42%
Find the probability, rounded to the nearest hundredth, that any student selected from all three grades is a junior who
lists soccer as the favorite sport
Fjunior n soccer) =

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?