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docker41 [41]
3 years ago
9

Robin wants to find out the number of salamanders by a pond near her house. She catches 45 of them, puts a leg band on each sala

mander, and puts them back by the pond. The next week, she catches 50 salamanders. Of those 50 salamanders, 3 have a leg band. Using this information, what is a reasonable estimate of the number of salamanders by the pond?
Mathematics
1 answer:
Verdich [7]3 years ago
8 0
Given:
1st week: caught 45 salamanders and put leg bands on them
2nd week: caught 50 salamanders and 3 have leg bands

3/50 = 0.06 of the salamander population have leg bands.

45 / 0.06 = 750 total number of salamanders 

<span>45/750 = 0.06 or 6% </span>

The reasonable estimate of the number of salamanders by the pond is 750 salamanders.


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Answer:

m=-7/2

Step-by-step explanation:

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Subtract  7  from both sides of the equation :

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Divide both sides of the equation by 2:

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3 years ago
The human body has a normal temperature of 98.6°F. Doctors will get worried if a sick patient has a temperature that varies from
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Answer:

|T- 98.6| \geq 3

And in order to solve this we have two possibilities:

Solution 1

T -98.6 \leq -3

And solving for T we got:

T \leq 98.6- 3

T\leq 95.6

Solution 2

And the other options would be:

T -98.6 \geq 3

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Step-by-step explanation:

For this case we can define the variable os interest T as the real temperature and we know that if we are 3 F more than the value of 98.6 we will be unhealthy so we can set up the following equation:

|T- 98.6| \geq 3

And in order to solve this we have two possibilities:

Solution 1

T -98.6 \leq -3

And solving for T we got:

T \leq 98.6- 3

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Solution 2

And the other options would be:

T -98.6 \geq 3

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3 years ago
Sara hina and Arslan have a total of RS 390in their wallet . Sara has Rs. 7more than Hina .Arslan has 3 times what sara has . Ho
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Answer:Sara hina and Arslan Have RS79.4,RS 72.4 and RS238.2 respectively.

Step-by-step explanation:

Step 1

Let the amount that hina has be x

the amount that sara has be represented as  7+x

and the amount that Arslan have be represented as 3(7+x)

such that the total amount in their wallet which is 390 can be expressed as

x+7+x + 3(7+x)=390

Step 2

Solving

x+7+x +21+3x=390

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y=3/2

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