Solve the problem.A candy company has 135 pounds of cashews and 180 pounds of peanuts which can be combined into two different mixes. The deluxe mix is half cashews and half peanuts and sells for $7 per pound. The economy mix is one-third cashews and two-thirds peanuts and sells for $5.60 per pound. How many pounds of each mix should be prepared for maximum revenue?
A. 135 pounds of deluxe mix and 0 pounds of economy mix
B. 180 pounds of deluxe mix and 135 pounds of economy mix
C. 270 pounds of deluxe mix and 90 pounds of economy mix
D. 90 pounds of deluxe mix and 45 pounds of economy mix
Answer: B
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Solve the problem.The size P of a certain insect population at time t (in days) obeys the function 
After how many days will the population reach 1500?
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The nationwide attendance per day for a certain motion picture can be approximated using the equation A(t) = 12t2e-t, where A is the attendance per day in thousands of persons and t is the number of months since the release of the film. Find and interpret the rate of change of the daily attendance after 4 months.
A. -1.758 thousand persons/day ? month; the daily attendance is decreasing. B. 1.758 thousand persons/day ? month; the change in the daily attendance is increasing. C. 3.517 thousand persons/day ? month; the daily attendance is increasing. D. -3.517 thousand persons/day ? month; the change in daily attendance is decreasing.
Use an integer to express the number.On a sunny day, the water temperature in the swimming pool rises 4 degrees.
A. 4 B. -4