Find the value of x. 45 60 90 80
1 answer:
Answer:
Step-by-step explanation:
The formula you want is x°=(major arc - minor arc)
If the minor arc is 90, and all the way around the outside of a circle is 360 degrees, that means that the major arc measures 360 - 90 = 270. Filling in our formula:
x°=(270 - 90)
or
x° = (180)
That gives us that x is a right angle at 90°
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Answer:
0.7734; no, it does not.
Step-by-step explanation:
To find this probability we will use a z-score. We are dealing with the probability of a sample mean being larger than a given value; this means we use the formula
Our x-bar in this problem is 155, as that is the sample mean we are trying to find the probability of. Our mean, μ, is 161 and our standard deviation, σ, is 31. Our sample size, n, is 15. This gives us
Using a z table, we see that the area under the curve less than this, corresponding with probability less than this value, is 0.2266. This means that the probability of the sample mean being larger than this is
1-0.2266 = 0.7734, or 77.34%.
Since there is a 77.34% chance of the passengers having a mean weight that is too heavy, this elevator is not safe.