C. ASK every ing
5. A bag contains 21 red marbles and 29 blue marbles. A marble is picked at
random from the bag. What is the probability of picking a red marble?
6. A spinner has 5 blue sections, 2 green sections and 1 red section. What is the
probability of the spinner not landing on red? P(not red) =
7. If you tossed one coin and rolled one die. What is the probability of the coin
landing on heads & roling an even number? P(heads, even) -
8. A bag contains 3 red marbles, 1 white marble, and 1 blue marble. You pick a
marble, but don't put it back. What is P(red, blue)?

Icould really use some with this question.

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?

What ratio is proportional to 18/21