Solve the problem.The profit that a vendor makes in a day by selling pretzels is given by the quadratic equation 
where P is the profit, in dollars, and x is the number of pretzels. Determine the number of pretzels that maximizes profits by finding 
A. 400 pretzels
B. 100 pretzels
C. 200 pretzels
D. 800 pretzels
Answer: A
Mathematics
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Write the number in scientific notation.0.000391
A. 39.1 × 10-5 B. 3.91 × 10-4 C. 3.91 × 10-3 D. 3.91 × 10-5
Mathematics
Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. 
C. 
D. 
Mathematics
Answer the question.Which one of the equations below matches the graph?
A. y = 2 cos
B. y = -2 sin
C. y = 2 sin
D. y = 2 cos
Mathematics
Use the inverse variation model to find the following.Suppose y varies inversely as x. Find an equation that relates y and x if it is known that y = 49.5 when 
Then use this equation to determine y if x is 81.
A. y = 5.8 B. y = 445.5 C. y = 5.5 D. y = 5.2
Mathematics