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11111nata11111 [884]
3 years ago
10

A study of fish is being conducted in a pond. They marked 30 fish and released them. The next day, they counted 75 fish, 25 of t

hem which had been marked. Find the best estimate of fish population in he pond.
Mathematics
1 answer:
Elena L [17]3 years ago
3 0
Round all the numbers and then add them then divide them by 3 hope this helps
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Let A and B be sets with cardinal numbers , n(A) = a and n(B) = b respectively . Decide whether the statement is true or false.
olya-2409 [2.1K]

Answer:

True

Step-by-step explanation:

A\cup B=A\cup(A-B)\\\\A\ and\ A-B\ are\ disjoint\ that\ means\ there\ is\ no\ common\ element\ in\ these\ two.\\\\n(A\cup B)=n(B\cup(A-B))\\\\n(A\cup B)=n(B)+n(A-B)\ \ \ \ \ \ \ as\ for\ disjoint\ set\ P,Q\ n(P\cup Q)=n(P)+n(Q)\\\\(n(P-Q)=n(P)-n(P\cap Q))\\\\n(AUB)=n(B)+n(A-B)\\\\n(AUB)=n(B)+n(A)-n(A\cap B)\\\\n(AUB)=n(A)+n(B)-n(A\cap B)\\\\Hence\ given\ statement\ is\ true

4 0
3 years ago
Please help me with number 2. I already have number 4. And leave a description on how to do it! Thank you!
Aneli [31]

Since your probably solving for W, isolate W by adding the -3n to both sides and get W=5n now use a calculator and multiply 5 and Pi. To Get 15.7.


I used N for pi since I don’t have that symbol

You need to specify what needs to be solved so I just assumed W

6 0
3 years ago
Debra has ridden 57 miles of a bike course the course is 60 miles long what percentage of the course has Debra ridden so far
Reptile [31]

Hello!

To find our answer, we just divide.

57/60=0.95

We multiply by 100 to find our percent

100(0.95)-95

Therefore, our answer is 95%

I hope this helps!

4 0
3 years ago
Read 2 more answers
Which is an example of an algebraic expression?
azamat
An algebraic expression doesnt have an equals sign or an inequality sign. 

So,

A is an expression
B is an inequality
C is an equation
D is an in inequality

So the answer is A
5 0
3 years ago
Give the domain and range. Tell if it is a function.
Anna [14]
It’s not a function
That’s all I know sorry!
6 0
3 years ago
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