If the demand function for a product is given by 
where p is the price per unit when x units are demanded, what is the total revenue when 90 units are demanded and supplied? Round your answer to the nearest cent.
?
A. $5,146.82
B. $7,318.25
C. $199.96
D. $2,975.38
E. $40.66
Answer: D
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Solve the problem.Find the average distance from a point 
in the annular region 
to the origin.
A. 
B. 
C. 
D. 
Provide an appropriate response. Explain the difference between the rule for multiplying powers that have like bases and the rule for raising a base to a power to another power. Illustrate the difference with examples.
What will be an ideal response?
Provide an appropriate response.Solve for x: 
= 
A. 3
B. 
C. 2
D. 0
E. - 
Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. By using linear regression, the following function is obtained: 
where x is the number of hours spent in the lab and y is the grade on the test. Use this function to predict the grade of a student who spends 16 hours in the lab. Round to the nearest tenth. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. 58.8 B. 72.6 C. 62.0 D. 54.8