Use FOIL to find the product.(4x + 6)(x - 9)
A. x2 - 30x - 31
B. 4x2 - 31x - 54
C. x2 - 54x - 30
D. 4x2 - 30x - 54
Answer: D
Mathematics
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Set up an integral for the length of the curve.y = 2 cot x, 
? x ? 
A. 
B. 
C. 
D. 
Mathematics
Check the answer. If the given answer is incorrect, give the correct answer.
A. Incorrect; should be 525 B. Incorrect; should be 524 R72 C. Incorrect; should be 524 R76 D. Correct
Mathematics
Solve the problem.Let Vt be the volume of the tetrahedron bounded by the coordinate planes and the plane 
, and let Ve be the volume of the ellipsoid 
. Find the quotient 
.
A. 4?
B. 8?
C. 
D. 
Mathematics
Find the break-even point for the total-cost and total-revenue functions.C(x) = 10x + 357,500R(x) = 35x
A. (14,200 units, $497,000) B. (14,300 units, $500,500) C. (14,400 units, $504,000) D. (14,500 units, $507,500)
Mathematics