Solve the problem.In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was properly conducted and that the 1000 people surveyed represent an unbiased sample of the entire population. Compute a 99.7% confidence interval (expressed using percents) for this survey.
A. 84.08% to 85.02%
B. 84.8% to 85.2%
C. 83.9% to 86.1%
D. 82.8% to 87.2%
E. 81.7% to 88.3%
Answer: E
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One way to weigh a very light object is to weigh a large number of the items and then divide to find the weight of one item. Before dividing, the weight of the packaging must be subtracted to find the net weight. Complete the table below. 
?
A. Weight of one item in grams: 0.6 g
Net Weight: 330 g
Total Weight: 354 g
B. Weight of one item in grams: 0.6 g
Net Weight: 354 g
Total Weight: 402 g
C. Weight of one item in grams: 6 g
Net Weight: 3540 g
Total Weight: 3564 g
D.
| Weight of one item in grams: 0.6 g |
Total Weight: 378 g
Translate to an equation and solve.130 of 260 is what percent?
A. 40% B. 100% C. 50% D. 200%
Solve.-5x = 2x - 28
A. x = 
B. x = 
C. x = 
D. x = 4
Solve each problem.Le Boulangerie, a bakery, sells four main items: sweet rolls, bread, cakes, and pies. The amount of each ingredient (in cups, except for eggs) required for these items is given by matrix A. Eggs Flour Sugar Shortening Milk
= A
The cost (in cents) for each ingredient when purchased in large lots or small lots is given in matrix B. Cost
Large Lot Small Lot
= B
Use matrix multiplication to find a matrix giving the comparative cost per bakery item for the two purchase options.
A. 
B. 
C. 
D. These matrices cannot be multiplied.