One of the closest answers would be 3.010
Answer:
0.02 or 2%
Step-by-step explanation:
The probability that test A is negative if the illegal drug has been used (P(A|N)) is 0.1 while the probability that test B is negative if the illegal drug has been used (P(B|N)) is 0.2.
Therefore, the probability that neither test is positive if the illegal drug has been used is:

There is a 0.02 or 2% probability that neither test is positive if the illegal drug has been used.
You would just divide by 23 on both sides...
23x = 6
x = 6/23 or x = 0.26
Answer:
176 cm
Step-by-step explanation:
45 degrees is what fraction of the circle
45/360 = 1/8
So multiply the arc length by 8 to get the circumference of the entire circle
22* 8 =176 cm
Answer:
This is an example of placebo testing.
Step-by-step explanation:
This is an example of placebo testing in which, the two groups are given two substances that are said to have an effect on the condition that is being treated but one of them is the actual medicine that is being tested while the other one has no real effect over the medical condition. But the volunteers are not given information on which of the medicines is real and which is not, so that this does not affect the outcome of the experiment.
I hope this answer helps.