Marianne collects coffee mugs from places she visits when she goes on vacation. she displays her 87 coffee mugs over her cabinets in her kitchen, including 8 mugs from texas, 4 from georgia, 4 from sc and 8 from california. if one of the coffee mugs accidentally falls to the ground and breaks, what is the probability that it is a california coffee mug?
a. 8/87
b. 4/87
c. 4/39
d. 1/13

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

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?

C. using a standard deck of 52 cards, the probability of selecting a 4 of diamonds or a 4 of hearts is an example of a mutually exclusive event. true of false