Convert to the indicated unit.3.2 mi = ___ ft
A. 16,896
B. 38.4
C. 5632
D. 115.2
Answer: A
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Solve the differential equation.ex
+ 4ex y = 3, x > 0
A. y = e-4x + Ce-x, x > 0 B. y = ex + Ce-4x, x > 0 C. y = e-x + Ce-4x, x > 0 D. y = e-x + e-4x, x > 0
Round the number to the place indicated.Round to the nearest hundredth: 14.93442
A. 14.94 B. 14.9344 C. 14.934 D. 14.93
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 140 seconds are required to make a 5-by-4 enlargement, find the time required for a 
enlargement.
A. 270 sec B. 210 sec C. 240 sec D. 180 sec
Determine the real solutions to the system of nonlinear equations.x2 + y2 = 4x + y = 2
A. (0, 0), (2, -2) B. (2,-2), (-2, -2) C. (0, 2), (2, 0) D. (0, -2), (-2, 0)