The first three terms of an arithmetic sequence are 23, 22, 21, find the 86th term.
A. –62
B. –108
C. 1,954
D. –63
Answer: A
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Solve the application.The diagram below shows the side view of a plan for a slanted roof. Find the unknown length in this roof plan. Give an exact answer, then approximate the length to the nearest tenth of a foot.
A. 
ft = 234.0 ft
B. 
ft ? 21.6 ft
C. 
ft ? 5.5 ft
D. 
ft ? 12.7 ft
Solve the problem. Round your answer to the nearest tenth.If $4000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $8000 at 4%?
A. 13.0 years B. 17.3 years C. 2.8 years D. 14.2 years
Solve the equation.8x - 4x + 3x = 28
A. 
B. 
C. 21
D. 4
For the cost function C(x), find the marginal cost at the given production level x. Round your answer to two decimal places.
?
?
A. $19.62 per item B. $21.28 per item C. $9.61 per item D. $19.60 per item E. $15.00 per item