3 years ago

If a teacher asks students to volunteer at a community nursing home after school, what would be a negative externality?

History

2 answers:

alina1380 [7]3 years ago

7 0

It’s c since it’s the only answer with a negative aspect

dusya [7]3 years ago

4 0

C. The only thing negative is C. All the others are positive

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Out of 150 150 offspring born to a gray, short fin fish crossed to a long finned, blue fish heterozygous for both traits, how ma

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Out of 150 offsprings born to a gray, 38 offsprings are expected to be blue with short fins

<h3>How to determine the expected number of blue fish with short fins</h3>

To do this, we make use of the following representations

L represents long finned fish
l represents short finned fish
g represents the gray fish
b represents the blue fish

So, we have the following genotypes

Lg, Lb, lg, lb

In the above 4 genotypes, lb represent the blue fishes with short fins

So, the probability of selecting a blue fish with short fins is:

$p = \frac 14$

In 150 offsprings, we have:

n = 150

So, the expected value is:

$E(x) = np$

This gives

$E(x) = 150 * \frac 14$

Evaluate the product

$E(x) = 37.5$

Approximate

$E(x) = 38$

Hence, 38 offsprings are expected to be blue with short fins