Determine speed of current and speed of boat in still water
The boat traveled 96 miles in eight hours against current. Boat returned to the starting point following same course traveling with current. The return trip took five hours. Determine speed of current and speed of boat in still water?
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At the drive through window of bank it's found that 10 customers get served every 15 minutes. The bank's manage is interested in finding out a way to raise the number of customers which can be served. He thought that knowing the probability of ser
A researcher is interested in studying people's mean age in certain region. If the population standard deviation is known to be eight years and 1.5 year of error margin is allowed, determine the minimum simple size the researcher needs to use, kno
A research shows that employee salaries at the company XYX, in thousands of dollars, are given by equation y-hat= 48.5 + 2.2 a + 1.5 b where ‘a' is the years of experience, and ‘b' is the education level in years. In thousands of dolla
A computer manufacturer claims that chips it makes are so accurate that there is only 1/2000 probability of getting a defective chip. A salesman at a local store purchased 5 chips and claimed that 2 of them were defective.
Boat returned to the starting point following same course traveling with current. The return trip took five hours. Determine speed of current and speed of boat in still water?
Two horses are 10 km. apart and begin moving towards each other, one horse @ 5.5km other @ 4.5km. The horsefly moving @30km goes back and forth between them. How far will horsefly travel when horses meet?
The plane took one hour longer to travel 560 miles on first portion of the flight than it took to fly 480 miles on second portion. If speed was same for every portion, determine flying time for second part of trip?
Fernando can drive 40 miles utilizing side roads in same time which it takes to travel 30 miles on freeway. If Fernando's rate on side roads is 7 mi/h faster than the rate on freeway, determine the rate on side roads.
Mark's football is stuck in the tree. He hopes to dislodge it by standing on the small hill and throwing the baseball at it. What maximum height baseball reaches?
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