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An airplane is flying at an airspeed of 505 km/hr in a wind blowing at 60 km/hr toward the southeast. In what direction should the plane head to end up going due east.
At a certain time of day, a building 300 m tall casts a shadow of 225 m, whereas a second building casts a shadow of 150 m. How tall is the second building?
That is, the next ten feet will cost $125; the next ten feet will cost $150, etc. How much will it cost to build a 90-foot tower?"
Elena's daughter sold 18 boxes of Girl Scout cookies. she was told that this amount represented 5% of the trop's sale. How many boxes did the troop sell?
The manager of a large apartment complex knows from experience that 120 units will be occupied if the rent is 400 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 5 dollar increase i..
Two tracking stations are on the equator 148 miles apart. A weather balloon is located on a bearing of N 32°E from the western station and on a bearing of N 20°E from the eastern station. How far is the balloon from the western station? Round to t..
Susan has 400 yards of fencing and wishes to enclose a rectangular area. Express the area of the rectangle as a function of the width of the rectangle.
Raw materials A and B are used to make one of the target company's product the product must contain no more than 9units of A and at least 18units of B, it must cost no more than 300$, how much of each raw material should be used to maximize the we..
Confidence interval for the mean test score.
What is the maximum likelihood estimator of the mean of x where x is the sample with distribution f(x)=rt^x where t= 1-r and r is between 0 and 1 and the mean of rt^x is t/r.
Flying with the jetstream, the same jet travels 4600km in 4 hours. What is the speed of the jet in still air, and what is the speed of the jetstream?
How large a sample size will need to be selected if we wish to have a 95% confidence interval that is accurate to within 1%.
It is 3 feet high, and the diameter of its circular base is 2 feet. Which expression could be used to find the volume of the drum?
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