9. 0.26666
10. 2.375
11. 7/20
12. 206111/<span>50000</span>
Answer:
None of above
Step-by-step explanation:
Mark brainliest
A.

Since about 95% of a normal distribution falls within two standard deviations of the mean, that leaves 5% that lie without, with 2.5% lying to either side.

b.

About 68% of a normal distribution lies within one standard deviation of the mean, so this probability is about 0.68.
c. You're looking for

such that

Since

occurs for

, it follows that

So there's a probability of 0.10 for having a demand exceeding about 1328 pounds.
Answer:
6/2=3
3*10=30
10*3.14=31.4
30+31.4=61.4 or rounded to 61