Solve the problem.The weekly sales in thousands of items of a product has a seasonal sales record approximated by 
(t is time in weeks with 
referring to the first week in the year). During which week(s) will the sales equal 85,380 items?
A. week 4, week 20, and week 52
B. week 4 and week 47
C. week 21 and week 30
D. week 30 and week 47
Answer: A
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Solve the problem.Marty's Tee Shirt & Jacket Company is to produce a new line of jackets with an embroidery of a Great Pyrenees dog on the front. There are fixed costs of $610 to set up for production, and variable costs of $30 per jacket. Write an equation that can be used to determine the total cost, C(x), encountered by Marty's Company in producing x jackets.
A. C(x) = 610 + 30x B. C(x) = 610 - 30x C. C(x) = (610 + 30) x D. C(x) = 610x + 30
Find all solutions of the equation in the interval [0°, 360°). Round the answers to the nearest tenth of a degree.sin ? = 0.6
A. {36.9°, 143.1°} B. {36.9°, 323.1°} C. {36.9°} D. {36.9°, 216.9°}
Graph the inequality.x ? 2
A. 
B. 
C. 
D. 
Find the value of the expression using the given values.-10xy + 7y - 7x = 4, y = 1
A. 40 B. -40 C. -33 D. -26