Solve.Suppose that the sales of a particular brand of appliance satisfy the relationship 
where S(x) represents the number of sales in year x, with x = 0 corresponding to 1990. For what years will sales be between 1960 and 2320?
A. Between 1993 and 1996
B. Between 1992 and 1995
C. Between 4 and 7
D. Between 1993 and 1995
Answer: A
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Find the value of the expression.7[32 + 6(5 + 6)]
A. 87 B. 525 C. 1155 D. 315
Solve the problem.In a sale, the price of a computer is reduced by $270. The sale price is $990. Find the marked price (original price) and the rate of discount. Round the discount rate to the nearest tenth of a percent if necessary.
A. $1260; 21.4% B. $720; 37.5% C. $1260; 27.3% D. $720; 27.3%
Find the indicated matrix.Let B = [-1 5 5 -3]. Find -4B.
A. [4 -20 -20 12] B. [-4 20 20 -12] C. [-3 3 3 -5] D. [4 5 5 -3]
If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 12.9 feet, ? = 20.573°, A = ?
A. 62.76 ft2 B. 29.88 ft2 C. 59.76 ft2 D. 32.88 ft2