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A communication tower is fixed to the top of a building. From a point 10 m from the base of the building, the angle of elevation to the top of the building is 60°, and to the top of the tower is 68°. What is the height of the communication tower, to the nearest tenth of a metre?
It has been recorded that the average number of errors in a newspaper is 4 mistakes per page. What is the probability of having 0 or one error
The Snell law to find the index of refraction
Suppose that a tank initially contains 2000 gal of water and the rate of change of its volume after the tank drains for t min is '(t)=(0.5)t)-30 (in gallons per minute).
In a certain fraction, the demoninator is 4 less than the numerator. If 2 is added to both the numerator and denominator, the resulting fraction is equal to 7/5. Find the original fraction
Explain why the rules for the order of operations are necessary; give examples to back up your explanation.
a customer must enter his or her four-digit Personal Identification Number (PIN). How many different PINs are possible?
What is the vertex of a parabola? How do you determine the vertex of the parabola? Demonstrate with an example.
a basektball court has a perimeter of 284 ft.the length is 42ft longer than the width.find the dimensions of the court.
The actual demand of a product in period 1 through 3 are 285, 229, 309 units, respectively. Find the forecast of demand in period 4 using the exponential smoothing model with a smoothing constant of 0.41. The forecast demand for period 1 was 302 u..
let f be the function defined by f(x) = 12x^(2/3) - 4x. a) find the intervals on which f is increasing. b) Find the x and y coordinates of all relative maximum points.
a motorboat travels 128 km in 2 hours going upstream.it travels 208kn going downstream in the same amount of time what is the rate of the boat still in the water? what is the rate of the current?
Define a function that gives the horizontal distance of the tire valve to the right of the tire's vertical diameter ...
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