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lina2011 [118]
3 years ago
5

How do you do this question?

Mathematics
1 answer:
Gekata [30.6K]3 years ago
5 0

Answer:

9.37

Step-by-step explanation:

T₄ means the area of the region using 4 trapezoids.

Dividing the interval into 4 equal widths, the width of each trapezoid is (4−0)/4 = 1.

The area of each trapezoid is:

T₁ = ½ (1.00 + 1.41) (1) = 1.205

T₂ =  ½ (1.41 + 2.24) (1) = 1.825

T₃ =  ½ (2.24 + 3.16) (1) = 2.700

T₄ =  ½ (3.16 + 4.12) (1) = 3.640

Therefore, the total area is:

T = 1.205 + 1.825 + 2.700 + 3.640

T = 9.37

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4 years ago
1) The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 5 years. Using the
8090 [49]

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:

\mu=25

The standard deviation is:

\sigma=5

The Z-score formula is:

Z = \frac{x-\mu}{\sigma}

For x=20 the Z-score is:

Z_{20}=\frac{20-25}{5}=-1

For x=30 the Z-score is:

Z_{30}=\frac{30-25}{5}=1

Then we look for the percentage of the data that is between -1 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:

\mu=27

The standard deviation is:

\sigma=3

The z-score formula is:

Z = \frac{x-\mu}{\sigma}

For x=24 the Z-score is:

Z_{24}=\frac{24-27}{3}=-1

For x=30 the Z-score is:

Z_{30}=\frac{30-27}{3}=1

Then we look for the percentage of the data that is between -1 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

8 0
4 years ago
A car travels 6 mile in 2 hours what is the unit rate
amid [387]

Answer:

A

Step-by-step explanation:

This is a fraction equal to

6 miles ÷ 2 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 2

6 miles ÷ 2 2 hours ÷ 2= 3 miles1 hour= 3 miles hour = 3 miles per hour

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Answer: third option: 15(x+3) hope this helps.
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3 years ago
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