Solve the problem.The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by 
where t is the number of hours since the worker's shift began. Assuming that 
when t = 1, find and expression for E.
A. E = 65t - 4t2 + 25
B. E = 65t - 2t2 + 151
C. E = 65t - 2t2 + 88
D. E = 65t - 2t2 + 25
Answer: D
Mathematics
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A. 
B. 
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D. 
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Find each product. Write the result in the form a + bi.
? 
A. -27i B. 27 C. -27 D. 27i2
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Simplify the root. 
A. 
B. x5
C. - 
D. - x5
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Referring to triangle ABC, find the area of the triangle.
?
?
Round to three significant digits.
?
A. 13.7 yd2 B. 13.5 yd2 C. 12.5 yd2 D. 13.3 yd2 E. 12.7 yd2
Mathematics