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Aleks04 [339]
3 years ago
6

How did the building of canals and railways boost the u.s. economy?

History
2 answers:
AveGali [126]3 years ago
8 0
<span> People who didn't have jobs were now employed got money and started buying more stuff from stores and what not which helped bring money into the economy again.</span>
nexus9112 [7]3 years ago
3 0
It gave then an efficient way of travel and better communication which allowed products to be transported across the country.
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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

Read more about expected values at:

brainly.com/question/11377348

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