Solve the problem.The cost of manufacturing clocks is given by C(x) = 68 + 21x - x2. Also, it is known that in t hours the number of clocks that can be produced is given by x = 2t, where 
Express C as a function of t.
A. C(t) = 68 + 42t - 4t
B. C(t) = 68 + 42t - 4t2
C. C(t) = 68 + 21t + t2
D. C(t) = 68 + 21t - 2
Answer: B
Mathematics
You might also like to view...
Solve the equation. Give the exact solution or solutions.log (x + 9) = 1 - log x
A. {1} B. {-1, 10} C. {-1} D. {-10, 1}
Mathematics
Find an equation for the line with the given properties.Slope undefined; containing the point (-2, 2)
A. x = -2 B. y = 2 C. x = 2 D. y = -2
Mathematics
Determine the standard equation of the hyperbola with the given characteristics.The vertices are at (-4, -6) and (-4, 2); an asymptote has equation y + 2 = - 
(x + 4).
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Translate the phrase into a division problem. Then find the quotient.Find the total of 73, 36, 2, 14, and 221.
A. 344 B. 346 C. 125 D. 273
Mathematics