Solve using the problem-solving strategy for systems of linear equations.The manager of a bulk foods establishment sells a trail mix for $8 per pound and premium cashews for $12 per pound. The manager wishes to make a 120-pound 
mixture that will sell for $9 per pound. How many pounds of each should be used?
A. 30 lb of trail mix
90 lb of cashews
B. 60 lb of trail mix
60 lb of cashews
C. 75 lb of trail mix
45 lb of cashews
D. 90 lb of trail mix
30 lb of cashews
Answer: D
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Use Stokes' Theorem to calculate the circulation of the field F around the curve C in the indicated direction.F = x2i + xyj + yk; C: the counterclockwise path around the perimeter of the rectangle in the x-y plane formed from the x-axis, y-axis , x = 3 and y = 10
A. -300 B. 300 C. 150 D. - 150
Find the radian measure of a central angle ? in a circle of radius r, assuming that ? intercepts an arc of length s. Round your answer to three decimal places when necessary.r = 4 m, s = 13 m
A. 10.21 B. 52 C. 3.25 D. 0.308
Write the decimal as a fraction or mixed number in lowest terms.0.488
A. 
B. 
C. 
D. 
The demand for rubies at Royal Ruby Retailers is given by
?
?
where p is the price RRR charges (in dollars) and q is the number of rubies RRR sells per week. At what price should RRR sell its rubies to maximize its weekly revenue?
?
Please enter your answer in dollars without the units.
Fill in the blank(s) with the appropriate word(s).