Solve the problem.A contractor needs to know the height of a building to estimate the cost of a job. From a point  away from the base of the building, the angle of elevation to the top of the building is found to be  Find the height of the building. Round your answer to the hundredths place when necessary.

A. 114.21 ft
B. 109.98 ft
C. 112.88 ft
D. 108.45 ft


Answer: B

Mathematics

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Solve the problem.In the formula N = Iekt, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 7.8%? Round to the nearest year.

A. 1 yr B. 4 yr C. 26 yr D. 9 yr

Mathematics

Solve the problem.An object is thrown upward with an initial velocity of 27 feet per second from the top of a 504-foot building. The height of the object at any time t can be described by the polynomial function  Find the height of the object at t = 5 seconds.

A. 131 ft B. -265 ft C. 559 ft D. 239 ft

Mathematics

Find the range of the given function.f(x) = 2x2 + 8x + 4

A. (-?, 4] B. (-?, 2] C. [-2, ?) D. [-4, ?)

Mathematics

Write a word name for the number in the sentence.In rounding 400,000,001,000 to the highest place value, the "1" has no effect on the "4".

A. Four hundred million, one hundred B. Four hundred thousand, one hundred C. Four hundred billion, one thousand D. Four billion, one hundred thousand

Mathematics