How fast are planes travelling if leave at same time
Two planes leave chicago at 8am, one traveling west at the speed 75 mph faster than other, that is headed east. At 11am, planes are 2,175 miles apart. How fast are planes travelling?
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At noon Joyce drove to lake at 30 miles per hour, but she made long walk back home at 4 miles per hour. How long she walk if she was gone for 17 hours? How far she walk?
In second grade class containing 12 girls, and 9 boys, 2 students are chosen at random to give out math papers. Determine the probability that both are girls.
Determine the probability of type II error if the true mean foam height is 200 mm and we suppose that a=0.05? What is the power of test from part b?
Your average rate on return trip is 30 miles per hour faster that the average rate on outgoing trip. If round trip takes two hours, find the average rate on outgoing trip to work?
Which of the following isn't the binomial distribution and why? Justify your answer. Tossing a fair quarter 10 times and looking at number of heads that shows up.
After flying for five hrs, a pilot increased his speed 10 mph. Complete flying time was 8 hrs, and distance was 1,532 mi. Determine rate of flying after speed was increased?
Among students 70% own a car, 50% own a bike and 40% own both. Determine a probability that a randomly chosen student own a least one of the above vehicles.
Determine the area under the standard normal curve for following:
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