What is the solution set of {x | x > -5} u {x | x < 5}?

A) all numbers except -5 and 5
B) the numbers between -5 and 5
C) the empty set
D) all real numbers

answer is B

Step-by-step explanation:

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To find the percentage decrease, you need to first find the decrease, and then find how much that is in relationship to the original value. It dropped from $2.86 to $2.81, so the decrease is $0.05. You divide the decrease, $0.05, with the original price, $2.86, to find the percentage decrease. Multiply that value by 100 to get the value in percent.