Step-by-step explanation:
plz refer the attachment
Answer:
1) 68%
2) 68%
Step-by-step explanation:
<h2>1) The ages of trees</h2>
We know the mean and the standard deviation.
The mean is:

The standard deviation is:

The Z-score formula is:

For x=20 the Z-score is:

For x=30 the Z-score is:

Then we look for the percentage of the data that is between
deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of the trees are between 20 and 30 years old
<h2>
2) Pizza delivery </h2>
First we calculate the Z-scores
We know the mean and the standard deviation.
The mean is:

The standard deviation is:

The z-score formula is:

For x=24 the Z-score is:

For x=30 the Z-score is:

Then we look for the percentage of the data that is between
deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of pizzas are delivered between 24 and 30 minutes
Answer:
The answer is <u><em>72%</em></u>
Step-by-step explanation:
54 out of 75 is a percentage of 72%.

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Answer: 1) Perpendicular
2) Concurrent
Step-by-step explanation:
The distance from a point to a line is the length of the perpendicular segment from the point to the line.
As Perpendicular segment is the shortest distance to the point of the line.
When three or more lines intersect at one point, they are concurrent.
Because Concurrent is a situation when three or more lines intersect each other at a single point.
Answer:
C. 60 blue marbles
Step-by-step explanation:
10 marbles are taken out of the bag.
6 marbles taken out are red.
So the other 4 marbles taken out are blue.
200 ÷ 4 = 50
and 50 is close to 60.
Let me know if this helps!