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Debora [2.8K]
2 years ago
13

Scientists tag and release a group of salmon after they hatch. Later, they catch a sample of salmon that return to the river and

check them for tags. In one sample, 40 out of 800 returning salmon have tags. What is the best prediction of the total number of tagged salmon in a sample of 2000? PLEASE HELP IF U DONT IMA BE SO MAD
Mathematics
1 answer:
Liula [17]2 years ago
7 0

The best prediction of the total number of tagged salmon in a sample of 2000 is 100.

<h3><u>Predictions</u></h3>

To determine what is the best prediction of the total number of tagged salmon in a sample of 2000, the following calculation must be performed:

  • 800 = 40
  • 2000 = X
  • 2000 x 40 / 800 = X
  • 80000 / 800 = X
  • 100 = X

Therefore, the best prediction of the total number of tagged salmon in a sample of 2000 is 100.

Learn more about predictions in brainly.com/question/18152997

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3 years ago
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Mary Stevens earns $6 an hour at her job and is entitled to time-and-a-half for overtime and double time on holidays. Last week
Effectus [21]
Multiply the hours buy her hourly pay:

6 × 40 = 240

6 × 6.5 = 39

6 × 8 = 48

Add them together:

240 + 39 + 48 = 327


ANSWER: Mary Stevens made $327.


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6 0
3 years ago
Could someone help? I got my answer, but I want to check if I’m right.
Taya2010 [7]

Hope it helps you........

3 0
2 years ago
A leprechaun places a magic penny under a​ girl's pillow. The next night there are 2 magic pennies under her pillow. Each night
11Alexandr11 [23.1K]

Answer:

  • tn = 2097152 pennies
  • tn = 20971.52 dollars.

Step-by-step explanation:

A surprisingly large amount of money.

The question is "Does the amount of money just double or do the previous amounts add to the present amount?"

I think it just doubles. Not only that, but she can't spend any of it until night 22 is reached.

  • tn = a*2^(n - 1)
  • a = 1   She starts with 1 penny.
  • n = 22
  • tn = 1*2^(22 - 1)
  • tn = 1*2^21
  • tn = 2097152 pennies
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8 0
3 years ago
If number A is a 2-digit number and its digits are transposed to form number B, then the difference between the larger of the tw
galben [10]
If the original number is ab it has a value of

10a+b  when it is reversed it will have a value of 10b-a

10b+a-10a-b  is the differences which is equal to

9b-9a

So the numbers must be divisible by 9
8 0
3 years ago
Read 2 more answers
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