A zoo veterinarian can purchase animal food of 4 different types, A, B, C, and D. Each food comes in the same size bag, and the number of grams of each of three nutrients in each bag are summarized in the following table. Use this information to answer the questions that follow. Food
For one animal, she determines that she needs to combine these bags to get 15,000 g of N1, 30,000 g of N2, and 19,000 g of N3. How many bags of each type of food should she order?
What will be an ideal response?
A = 3D + 2200; B = 400 - 2D; C = 200 - D; D = any amount (? 200)
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Find the average value of 
over the given region.
over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 54
B. 
C. 45
D. 
Solve the problem.The angle of reflection ? of a ray from air to a medium of index n is given by Snell's Law to be sin ? = 1/n. Find ? if n = 10/9.
A. 1.6° B. 64.2° C. 115.8° D. 25.8°
Solve the problem.Let A = 
and B =
. Find A + B.
A. 
B. 
C. 
D. 
A population growing at an annual rate r will triple in a time t given by the formula 
. If the growth rate remains constant and equals 9% per year, how long will it take the population of the town to triple?
?
A. 2.2 years B. 5.3 years C. 6.6 years D. 1 years E. 12.2 years