Solve the problem.The cost of manufacturing clocks is given by C(x) = 72 + 62x - x2. Also, it is known that in t hours the number of clocks that can be produced is given by x = 9t, where 
Express C as a function of t.
A. C(t) = 72 + 62t + t2
B. C(t) = 72 + 558t - 81t2
C. C(t) = 72 + 558t - 81t
D. C(t) = 72 + 62t - 9
Answer: B
Mathematics
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Solve the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.
A. B = 37.2°, b = 321.5 ft, c = 259.9 ft B. B = 37.2°, b = 259.9 ft, c = 321.5 ft C. B = 37.2°, b = 26.8 ft, c = 21.8 ft D. B = 36.8°, b = 257.5 ft, c = 321.5 ft
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Express the sum or difference as a product of sines and/or cosines.sin(6?) + sin(2?)
A. 2 sin(4?) cos(2?) B. 2 sin(4?) sin(2?) C. 2 cos(4?) sin(2?) D. 2 sin(8?)
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Complete the square to write the equation in the form 
+ 
= 1 or 
+ 
= 1.4x2 + 25y2 - 150y + 125 = 0
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Find the product and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics