Solve the variation problem.The time necessary to make an enlargement of a photo negative varies directly as the area of the enlargement. If 120 sec are required to make a 
enlargement, find the time required for a 
enlargement.
A. 240 sec
B. 168 sec
C. 216 sec
D. 192 sec
Answer: D
Mathematics
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Solve the problem.A rectangular box with square base and no top is to have a volume of 32 ft3. What is the least amount of material required?
A. 36 ft2 B. 40 ft2 C. 48 ft2 D. 42 ft2
Mathematics
The number of cars sold weekly by a new automobile dealership grows according to a linear growth model. The first week the dealership sold two cars (P0 = 2). The second week the dealership sold six cars (P1 = 6).If PN denotes the number of cars sold in the Nth week, then
A. PN = PN-1 - 4. B. PN = PN-1 + 4. C. PN = 4PN-1. D. PN = PN-1 + 2. E. none of these
Mathematics
Provide an appropriate response.Simplify: 
A. x
B. x
C. x
D. x
Mathematics
Find all solutions of the equation in the interval [0, 2?).2 cos2 ? - 3 cos ? + 1 = 0
A. 
B. 
C. 
D. 
Mathematics