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Fofino [41]
3 years ago
13

Need to find the original fraction.

Mathematics
1 answer:
Andre45 [30]3 years ago
3 0
 the answer i got was n=30
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The diameters of Douglas firs grown at a Christmas Tree Farm are normally distributed with a mean of 4 inches and a standard dev
leva [86]

Answer:

The proportion of trees greater than 5 inches is expected to be 0.25 of the total amount of trees.

Step-by-step explanation:

In this problem we have a normal ditribution with mean of 4.0 in and standard deviation of 1.5 in.

The proportion of the trees that are expected to have diameters greater than 5 inches is equal to the probability of having a tree greater than 5 inches.

We can calculate the z value for x=5 in and then look up in a standard normal distribution table the probability of z.

z=\frac{x-\mu}{\sigma}=\frac{5-4}{1.5}=0.67

P(x>5)=P(z>0.67)=0.25  

The proportion of trees greater than 5 inches is expected to be 0.25 of the total amount of trees.

8 0
3 years ago
A spinner has three sections. The table shows the results of spinning the arrow on the spinner 80 times.
slega [8]

Answer:

9/20

Step-by-step explanation:

Total trials = 80

Observed successful trials = 36

36/80

= 9/20

3 0
4 years ago
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Svet_ta [14]

Answer:

it is a ray

Step-by-step explanation:

because all the other ans do not have the properties which are mentioned in the question

3 0
3 years ago
Jerry had $1,018.00 in savings. Last week he spent $84.00 on a desk and $372.00 on a computer from his savings. This week at a p
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The correct answer is$412.00
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Jasper has an annual salary of $71,000, and his company pays him twice a month. What is the gross income per paycheck that Jaspe
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Divide $71,000 by 24 because there are 12 months in a year and he gets paid 2 times a month. I got $2,958.33
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4 years ago
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