Solve the problem.Yearly sales at a certain department store follow the model 
where y is the total sales in thousands of dollars and x is the number of years after the store opened. How many years after the store's opening will the total sales for the year first be less than 
?
A. 929 yr
B. 10 yr
C. 6 yr
D. 8 yr
Answer: C
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Solve.One end of a wire is attached to the top of a 10-foot pole and the other end is anchored into the ground 5 feet from the base of the pole. Find the length of the wire, rounded to the nearest tenth.
5 feet
A. 15 ft B. 15.5 ft C. 11.7 ft D. 11.2 ft
Find the weighted mean of the numbers in the table. Round to the nearest tenth.Find the mean salary for the employees. Round to the nearest thousand dollars. 
A. $41,000 B. $40,000 C. $45,000 D. $39,000
Solve.At Allied Electronics, production has begun on the X-15 Computer Chip. The total cost function is given by 
and the total profit function is given by 
where x represents the number of boxes of computer chips produced. The total revenue function, R(x), is such that 
Find R(x).
A. R(x) = 55x - 0.3x2 B. R(x) = 53x + 0.3x2 C. R(x) = 52x - 0.6x2 D. R(x) = 53x - 0.3x2
meters The force of static friction. The force of static friction is directly proportional to the normal force on an object. Assume that the force of static friction for a given object is 1.8 N when the normal force on that object is 18 N. What would the force of static friction be if the normal force becomes 31 N?
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