Find the circumference and area of the circle. Use 3.14 for ?. Round your results to the nearest tenth.
A. C ? 26.7 mi, A ? 106.8 mi2
B. C ? 53.4 mi, A ? 226.9 mi2
C. C ? 53.4 mi, A ? 53.4 mi2
D. C ? 26.7 mi, A ? 907.5 mi2
Answer: B
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Find the measures of all the angles in the figure below, if 
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A. 
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B. ?
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C. ?
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D.
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E. ?
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Simplify, where possible.8a - 3a + 5
A. -5a + 5 B. 10a C. 11a + 5 D. 5a + 5
Solve triangle ABC. If necessary, round the answer to the nearest tenth. 
A. C = 103°, a = 16 m, b = 9 m B. C = 103°, a = 44.4 m, b = 25.1 m C. C = 103°, a = 9 m, b = 16 m D. C = 97°, a = 8.8 m, b = 15.7 m
Suppose a pharmaceutical corporation has two plants that produce the same over-the-counter medicine. If x1 and x2 are the numbers of units produced at plant 1 and plant 2, respectively, then the total revenue for the product is given by src="https://sciemce.com/media/2/ppg__cognero__Section_13.3__media__6e0d53ee-6bbb-4d74-9bf0-167dd5b004e2.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_190851fbe60a426abe63a93b1" /> find the marginal revenue 
. When 
and 
for plant 1.
?
A. 172
B. 170
C. 80
D. 122
E. 91