Mathematics, 23.03.2020 07:18 sky81428
The price of a dress is reduced by 60%.When the dress still does not sell, it is reduced by 60% of the reduced price. If the price of the dress after both reductions is $72, what was the original price?The price of a dress is reduced by 25%.When the dress still does not sell, it is reduced by 25% of the reduced price. If the price of the dress after both reductions is $72, what was the original price?
Answers: 2
Mathematics, 21.06.2019 13:50
At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)
Answers: 3
Mathematics, 22.06.2019 02:30
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.
Answers: 3
The price of a dress is reduced by 60%.When the dress still does not sell, it is reduced by 60% of t...
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