Solve the problem.The regression line relating attitude rating (x) and job performance rating (y) for the employees of a company is 
Use the regression line to predict the job performance rating for a person whose attitude rating is 56.
A. 67.9
B. 12.6
C. 80.1
D. 68.8
Answer: D
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Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 3
B. 
= 0, 
= 0, 
= 12
C. 
= 0, 
= 0, 
= 2
D. 
= 0, 
= 0, 
= 18
Use the order of operations to simplify the expression.29 + 13 ? 24
A. 341 B. 1008 C. 401 D. 66
Solve the problem.Suppose an animal feed to be mixed from soybean meal and oats must contain at least 100 lb of protein, 20 lb of fat, and 9 lb of mineral ash. Each 100-lb sack of soybean meal costs $20 and contains 50 lb of protein, 10 lb of fat, and 8 lb of mineral ash. Each 100-lb sack of oats costs $10 and contains 20 lb of protein, 5 lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost?
A.
| 2 sacks of soybeans and 0 sacks of oats |
B.
sacks of soybeans and 
sacks of oatsC.
sacks of soybeans and 
sacks of oatsD. 0 sacks of soybeans and 2 sacks of oats
If the function is one-to-one, find its inverse. If not, write "not one-to-one."f(x) = (x + 6)2
A. f-1(x) = 
- 6
B. f-1(x) = 
C. f-1(x) = 
D. not a one-to-one