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Answer: 
Step-by-step explanation:
Opposite angles of a cyclic quadrilateral are supplementary, so:

This means that 
The absolute value of -15 is 15, because -15 is 15 away from zero
Answer:
<u>The correct answer is D. 4.55</u>
Step-by-step explanation:
1. Let's check the information given to resolve the question:
What is the approximate value of 2π-√3?
2. Replacing the equation with the values:
π = 3.1416
√3 = 1.7321
2π-√3
2 (3.1416) - 1.7321 = 6.2832 - 1.7321 = 4.5511
4.55 (Rounding to two decimal places)
<u>The correct answer of 2π - 3 is D.4.55</u>
(24/30)*100 = 80%
Therefore she decreased from 100% to 80%, which is about 20% decrease.
Thus, the answer is 20%
Another way to do this is.

Which in this case is