Which explanation best describes the answer to this problem?
a rock collectors convention has 604 people signed up to attend. the convention organizers want to put 28 people in each room during the group discussion time.
how many rooms does the convention need for the discussion groups?
a. divide 604 by 28. the answer is 21 with 16 left over. so the convention needs to have 21 rooms.
b. divide 604 by 28. the answer is 21 with 16 left over. so the convention needs to have 22 rooms.
c. multiply 604 by 28. the answer is 16,912. so the convention needs to have 16,912 rooms.
d. multiply 604 by 28. the answer is 17,000. so the convention needs to have 17,000 rooms.

An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb.the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.