Solve the problem.Find the consumers' surplus if the demand for an item is given by 
assuming supply and demand are in equilibrium at 
A. 72
B. 216
C. 432
D. 144
Answer: D
Mathematics
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Solve the problem.A boat goes 450 miles downstream in the same time it can go 360 miles upstream. The speed of the current is 3 miles per hour. Find the speed of the boat in still water.
A. 24 mph B. 81 mph C. 30 mph D. 27 mph
Mathematics
Find the sum.
A. 13
B. 11
C. 12
D. 2
Mathematics
Let x be a continuous random variable with a standard normal distribution. Find the requested probability.P(x ? 0.97)
A. 0.1660 B. 0.8340 C. 0.8315 D. 0.8078
Mathematics
Differentiate the given function.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics