Solve.The Forest County school system has 3682 high school students, 3921 middle school students, and 4909 elementary school students. How many total students are in the Forest County school system?
A. 12,420
B. 12,567
C. 12,472
D. 12,512
Answer: D
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Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 14 in. B. 221 in. C. 21 in. D. 442 in.
Answer the question.Two angles are complimentary. One of the angles is r. How do you express the other angle?
Fill in the blank(s) with the appropriate word(s).
Write the system of equations associated with the augmented matrix. Do not solve.
A. 
B. 
C. 
D. 
From a tract of land, a developer plans to fence a rectangular region and then divide it into two identical rectangular lots by putting a fence down the middle. Suppose that the fence for the outside boundary costs $6 per foot and the fence for the middle costs $4 per foot. If each lot contains 4,600 square feet, find the dimensions of each lot that yield the minimum cost for the fence. Round your answer to two decimal places. ??
A. Dimensions are 42.19 ft for the side parallel to the divider and 109.03 ft for the other side. B. Dimensions are 109.03 ft for the side parallel to the divider and 42.19 ft for the other side. C. Dimensions are 67.82 ft for the side parallel to the divider and 67.82 ft for the other side. D. Dimensions are 58.74 ft for the side parallel to the divider and 78.32 ft for the other side. E. Dimensions are 78.32 ft for the side parallel to the divider and 58.74 ft for the other side.