Solve.Smallville and Big City are about 1950 miles apart. At 10:00 A.M. an airplane leaves Smallville for Big City flying at 300 miles per hour. At the same time an airplane leaves Big City for Smallville flying at 350 miles per hour. How long will it be before the two airplanes meet?
A. 3 hr
B. 6 hr
C. 8 hr
D. 4 hr
Answer: A
Mathematics
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Solve the initial value problem.
= 
; 
t=1 = -5, r(1) = 5
A. r = 
- 2t + 4
B. r = 
- 2t + 6
C. r = 
- 
t + 4
D. r = 3t - 2t + 6
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Solve the given third- or fourth-order differential equation.D3y + 3 D2y - 16 Dy - 48y = 0
A. y = c1e4x + c2e3x B. y = c1e4x + c2e-3x C. y = c1e4x + c2e-4x+ c3e3x D. y = c1e4x + c2e-4x+ c3e-3x
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Find possible value(s) of ? in the interval [0°, 360°) with the given trigonometric function value.cos ? = 
A. 60°; 300° B. 60°; 120° C. 150°; 210° D. 210°; 330°
Mathematics
Match the correct function to the graph.
A. y = x - 1
B. y = 
C. y = 
D. y = 
Mathematics