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11111nata11111 [884]
2 years ago
15

A heron is perched in a tree 50 feet above sea level Directly below the heron, a pelican is flying 17 feet above sea level Direc

tly below the birds is a trout,
swimming 23 feet below sea level
Select the THREE true statements


A The difference in height between the pelican and the heron is -33 feet

B The difference in height between the pelican and the heron is 33 feet.

C. The distance between the heights of the pelican and heron is -33 feet

D The difference in height between the pelican and the trout is -40 feet

E. The difference in height between the pelican and the trout is 40 feet


F. The distance between the heights of the pelican and the trout is 40 feet
I need this NOW
!!!! ASAP
Mathematics
1 answer:
IceJOKER [234]2 years ago
7 0

Answer:

c my friend easy maths asfdf

Step-by-step explanation:

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8 percent. The answer to 4$is what percent of 50$ is 8%



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Find the mode(s) of the data.<br><br> 3<br><br> 5<br><br> 8<br><br> 9<br><br> There is no mode.
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Teacl Smolts are young salmon at a stage when their skin becomes covered with silvery scales and they start to migrate from fres
erma4kov [3.2K]

Answer:

a) s = 8.81

b) Q1 = 43.4, Q2 = 49.4, Q3 = 57.35

c) See below

Step-by-step explanation:

(a) Find the standard deviation of the reflectance for these smolts. (Round your answer to two decimal places.)

In order to find the standard deviation, we need the mean first. The mean is defined as

\bar x=\displaystyle\frac{\displaystyle\sum_{i=1}^{n}x_i}{n}

where the x_i are the values of the data collected and n=50 the size of the sample.

So, the mean is

\bar x=50.882

Now, the standard deviation of the sample is defined as  

s=\sqrt{\displaystyle\frac{\displaystyle\sum_{i=1}^n(x_i-\bar x)^2}{n-1}}

and we have that our standard deviation is

s = 8.81

(b) Find the quartiles of the reflectance for these smolts

To find the quartiles, we must sort the data from lowest to largest:  

33.6,  37.7,  38.3,  38.7,  42,  42,  42.2,  42.4,  42.7,  42.8,  42.9,  43.1,  43.7,  43.8,  44.2,  44.6,  45.5,  45.7,  46.3,  46.6,  47.4,  47.6,  47.7,  47.9,  49.2,  49.6,  50.5,  50.9,  51.3,  53,  53.9,  54.8,  54.9,  55.5,  56,  56,  56.2,  57.1,  57.6,  58.3,  59,  59.5,  60.4,  63.2,  63.4,  63.5,  64.6,  68,  69.1,  69.2

The <em>first quartile</em> is the number between the 12th and the 13th data (so 25% of the data are below it and 75% above it)

So the 1st quartile is

Q_1=\displaystyle\frac{43.1+43.7}{2}=43.4

The <em>2nd quartile is the median</em>, the point between the 25th and 26th data, it splits the data in two halves.

Q_2=\displaystyle\frac{49.2+49.6}{2}=49.4

The 3rd quartile is the point between the 38th and 39th data (so 75% of the data are below it and 25% above it)

Q_3=\displaystyle\frac{57.1+57.6}{2}=57.35

(c) Do you prefer the standard deviation or the quartiles as a measure of spread for these data? Give reasons for your preference.

In this case, we prefer the quartiles as a measure of spread since the data are very scattered around the mean and there is no a central tendency.

3 0
3 years ago
What motivations are based on right and wrong?
ANEK [815]

Answer:

yes

Step-by-step explanation:

no no

4 0
2 years ago
Find the measure of each angle indicated
qaws [65]

Answer:

D) 45 degrees

Step-by-step explanation:

145 = 100 + x

Subtract 100 from both sides

45 = x

OR

180 - 145 = 35

<FEG = 35

100 + 35 + x = 180

135 + x = 180

Subtract 135 from both sides

x = 45

6 0
3 years ago
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