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Ilya [14]
3 years ago
7

What is the most important producer in both freshwater and marine ecosystem?

Social Studies
2 answers:
oee [108]3 years ago
8 0
The most important producer in both freshwater and marine ecosystems is phytoplankton.
Darya [45]3 years ago
7 0
The most important producer in both freshwater and marine ecosystem is Phytoplankton. 
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How many days are there in one month? It is measured in the<br>​
DiKsa [7]

Answer:

28, 30, or 31. (29 in leap years)

Explanation:

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If you get a replacement driver's license, will your first one still scan successfully at a gas station while trying to buy beer
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3.6.46-T Consider the following sample data for two variables. x 7 8 5 3 9 y 7 5 9 7 7 a. Calculate the sample covariance. b. Ca
Mrac [35]

Answer:

1. Co-variance= -1.2

2. correlation coefficient= -0.4404

3.  There is weak negative relationship between x and y.

Explanation:

1.

Co-variance= Cov(x,y)= sum[(x-xbar)(y-ybar)]/n

xbar=sumx/n=32/5=6.4

ybar=sumy/n=35/5=7

x 7 8 5 3 9

x-xbar 0.6 1.6 -1.4 -3.4 2.6

y 7 5 9 7 7

y-ybar 0 -2 2 0 0

(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0

Cov(x,y)= sum[(x-xbar)(y-ybar)]/n=-6/5=-1.2

Cov(x,y)=-1.2

2.

correlation coefficient=r

r=\frac{sum(x-xbar)(y-ybar)}{\sqrt{sum(x-xbar)^2sum(y-ybar)^2} }

x 7 8 5 3 9

x-xbar 0.6 1.6 -1.4 -3.4 2.6

y 7 5 9 7 7

y-ybar 0 -2 2 0 0

(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0

(x-xbar)² 0.36 2.56 1.96 11.56 6.76

(y-ybar)²  0 4 4 0 0

r=\frac{-6}{\sqrt{23.2(8)} }

r=-0.4404

3. Since the value of correlation coefficient is negative and less than 0.5 , so, we can say that there is weak negative relationship between x and y.

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3 years ago
What was the second oldest college in america?
laila [671]
<span>The College of William and Mary. Established: 1693</span>
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Imagine the hydrosphere did not exist. Would weather still occur? Use complete sentences to explain your answer.
Genrish500 [490]

Answer:

We know weather happens in the atmosphere, but without the hydrosphere, there would be no water to evaporate and so no cloud or rain could form. Without oceans and land (hydrosphere and geosphere), there would be no wind (as winds are produced by differences of air temperature between the land and oceans).

Explanation:

Hope this helps> Plz mark me brainliest

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