Solve the problem.Car A (travelling north at 30 mph) and car B (traveling west at 20 mph) are heading toward the same intersection. Car A is 5 miles from the intersection when car B is 6 miles from the intersection. . Find a formula for the distance between the cars as a function of time, using the parametric equations that describe the motion of cars A and B. Using a graphing utility, find the minimum distance between the cars. When are the cars closest? 
A. d = 
; 2.22 mi; 12.46 min
B. d = 
; 441.82 mi; 12.46 min
C. d = 
; 2.22 mi; 0.21 min
D. d = 
; 2.22 mi; 12.46 h
Answer: A
Mathematics
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)3
A. 
3
B. (7mn)3/2
C. (7mn)2/3
D. 
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Solve the problem.The decay of 431 mg of an isotope is given by A(t) = 431e-0.032t, where t is time in years. Find the amount left after 32 years.
A. 78 mg B. 150 mg C. 155 mg D. 417 mg
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Simplify the expression.4(x + 8) - 1
A. 4x + 33 B. x + 31 C. 4x + 7 D. 4x + 31
Mathematics
Calculate 
.A = 
A. -37 B. -59 C. 37 D. 229
Mathematics