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3 years ago

6

If 3400 maple trees are counted on a 3km x 4km rectangular patch of land, what is the density of maple trees per square kilomete

r? round to the nearest tenth

1 answer:

Aneli [31]3 years ago

4 0

3 × 4 = 12

3400 ÷ 12 = 283.33333333..

the desity is 283.3 trees per square kilometer.

just ask if you have any questions :)

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Yuri [45]

Answer:

y= -4/3 + 22

Step-by-step explanation:

y= -4/3x -1

14 = -4/3 (6) + b

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22= b

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3 years ago

the area of a circle is 81 pi m^2. what is the circumference, in meters? express your answer in terms of pi.

mestny [16]

<h3>Answer: 18pi</h3>

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Explanation:

The area 81pi square meters leads to the radius 9 meters

Use the formula A = pi*r^2 to see why this is the case. You plug in A = 81pi and solve for r to get r = 9.

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3 years ago

State whether the given measurements determine zero, one, or two triangles. A = 80°, a = 24, b = 50

Arte-miy333 [17]

We know that
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a/sin A=b/sin B---------> a*sin B=b*sin A
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4 years ago

Read 2 more answers

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3 years ago

The CEO of a large corporation asks his Human Resource (HR) director to study absenteeism among its executive-level managers at

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Answer:

Following are the answer to this question:

Step-by-step explanation:

Given:

n = 30 is the sample size.

The mean $\bar X$ = 7.3 days.

The standard deviation = 6.2 days.

df = n-1

$= 30-1 \\ =29$

The importance level is $\alpha$ = 0.10

The table value is calculated with a function excel 2010:

$= tinv (\ probility, \ freedom \ level) \\= tinv (0.10,29) \\ =1.699127\\ = t_{al(2x-1)}= 1.699127$

The method for calculating the trust interval of 90 percent for the true population means is:

Formula:

$\bar X - t_{al 2,x-1} \frac{S}{\sqrt{n}} \leq \mu \leq \bar X+ t_{al 2,x-1} \frac{S}{\sqrt{n}}$

$=\bar X - t_{0.5, 29} \frac{6.2}{\sqrt{30}} \leq \mu \leq \bar X+ t_{0.5, 29} \frac{6.2}{\sqrt{30}}\\\\=7.3 -1.699127 \frac{6.2}{\sqrt{30}}\leq \mu \leq7.3 +1.699127 \frac{6.2}{\sqrt{30}}\\\\=7.3 -1.699127 (1.13196)\leq \mu \leq7.3 +1.699127 (1.13196) \\\\=5.37 \leq \mu \leq 9.22 \\$

It can rest assured that the true people needs that middle managers are unavailable from 5,37 to 9,23 during the years.

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3 years ago