Solve the problem.John (whose line of sight is 6 ft above horizontal) is trying to estimate the height of a tall oak tree. He first measures the angle of elevation from where he is standing as 35°. He walks 30 feet closer to the tree and finds that the angle of elevation has increased by 12°. Estimate the height of the tree rounded to the nearest whole number.
A. 61 ft
B. 90 ft
C. 86 ft
D. 67 ft
Answer: D
Mathematics
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Provide an appropriate response.Use the growth rate of 0.5% to estimate the population of a growing country in 2080. Start from the 2000 population of 27 million. Use the approximate doubling time formula.
A. 90.8 million B. 54.0 million C. 40.1 million D. 59.6 million
Mathematics
David's company has to ship 2,200 boxes of sprinklers. 4 truckloads all containing the same number of boxes were delivered. How many boxes were shipped in each truck?
A. 50 boxes B. 55 boxes C. 555 boxes D. 550 boxes
Mathematics
Simplify the fraction to lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Find the product.(4x2 + 3x + 4)(x2 + 5x - 4)
A. 4x4 + 20x3 + 3x2 + 8x - 16 B. 4x4 + 20x3 - 1x2 + 8x - 16 C. 4x4 + 23x3 + 3x2 + 8x - 16 D. 4x4 + 23x3 - 1x2 + 8x - 16
Mathematics