Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.
A. x13y10
B. 
C. 
D. 
Answer: B
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Measurements are made at two different times. Find the absolute change and then find the percentage change. Round answers to the nearest tenth if necessary.The unemployment rate in Midtown a decade ago was 20%. This year it was 24%.
A. Absolute change: 20 percentage points Percentage change: 4% B. Absolute change: 4 percentage points Percentage change: 16.7 % C. Absolute change: -4 percentage points Percentage change: 16.7 % D. Absolute change: 4 percentage points Percentage change: 20%
Find the probability.In one town, 32% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Round to the nearest thousandth.
A. 0.102 B. 0.099 C. 0.320 D. 0.640
Solve, rewrite in interval notation, and graph.4x - 10 ? 18 and 2x - 1 > 11
A. (-?, 6) ? [7, ?)
B. [6, 7)
C. (-?, 7]
D. (6, 7]
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500