Which one of these points is a solution to y <-3x - 2
1 answer:
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Answer:
Step-by-step explanation:
we will find the area of the inner circle and then the area of the outer circle and see what the ratio is between those 2
area of a circle = (where r is the radius, NOT the diameter, easy to confuse)
the radius of the inner circle is 2.5. which is half of the diameter of 5
inner circle = *(2.5)^2
inner circle = 19.6349...
outer circle = *(10^2)
outer circle = 314.1592...
the ratio is 19.6349... / 314.1592... = 0.0625
0.0625 = 6.25%
= 6% ( rounded to nearest whole number )
Answer:
15.87%
Step-by-step explanation:
Given that:
The mean (μ) = 1000 hours, the standard deviation (σ) = 100 hours.
The z score provides a means of measurement in statistics to determine the variation of a raw score from the mean. The z score is given as:
To find that a randomly chosen light bulb will last less than 900 hours:
Therefore, P(x < 900) = P(z < -1) = 0.1587 = 15.87%