Find the sales tax and total sale. Round to the nearest cent.
A. $2416.04; $46,344.04
B. $1976.76; $45,904.76
C. $24,160.40; $68,088.40
D. $2855.32; $46,783.32
Answer: A
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One model for expenditures at high schools gives the cost C, in dollars per pupil, as a function of the number n of students enrolled. The relationship is
.
?
Find the enrollment and cost that correspond to the minimum cost per pupil. Round your answers to the nearest whole number.
A. An enrollment of 1909 gives a minimum cost of $340 per pupil. B. An enrollment of 340 gives a minimum cost of $1909 per pupil. C. An enrollment of 1911 gives a minimum cost of $344 per pupil. D. An enrollment of 344 gives a minimum cost of $1911 per pupil.
Find the exact value of the product.cos 45° cos 15°
A. 
B. 
C. 
D. 
Determine the vertex, focus, and directrix of the parabola and sketch its graph.(y - 3)2 = 4(x - 2)
A. vertex: (3, 2)
focus: (4, 2)
directrix: x = 2
B. vertex: (-2, -3)
focus: (-1, -3)
directrix: x = -3
C. vertex: (2, 3)
focus: (3, 3)
directrix: x = 1
D. vertex: (2, 3)
focus: (1, 3)
directrix: x = 3
Find the derivative of the function.
f (x) = 2 cos x ? 2x ? 8