Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 24 seconds are required to make a 3-by-4 enlargement, find the time required for a 
enlargement.
A. 140 sec
B. 280 sec
C. 70 sec
D. 210 sec
Answer: A
Mathematics
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Find the flux of the vector field F across the surface S in the indicated direction.F(x, y, z) = xzi + yzj + k , S is the cap cut from the sphere x2 + y2 + z2 = 9 by the plane 
direction is outward
A. 35?
B. - 
?
C. 
?
D. 
?
Mathematics
Graph the function.f(x) = x2 + 2x - 7
A. 
B. 
C. 
D. 
Mathematics
Use a calculator to solve the equation on the interval 0 ? ? < 2?. Round the answer to two decimal places.5 cot ? = - 7
A. 2.19, 5.33 B. 2.52, 3.76 C. 2.52, 5.66 D. 2.19, 7.23
Mathematics
Identify the coefficient of each term.-13
A. 1 B. 13 C. -13 D. 0
Mathematics