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Korolek [52]
3 years ago
11

I need help with number 4 please help and explain

Mathematics
1 answer:
Shtirlitz [24]3 years ago
7 0
Are you trying to find the area?
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A map uses the scale of 3/4 of an inch to represent 3miles. If the
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Answer: 6.25 inches

Step-by-step explanation: multiply 3/4 by 25 then divide the answer by 3

hope this helps and mark me brainliest if you can thank you

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Volume of right cylinder r 30mm height 30mm
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The Volume is V= 84823. say thanks haha
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If ad=30 and dc=30 what is the length of bd
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2 years ago
5pts and the person who has the correct answer gets brainliest​
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Answer:

4

Step-by-step explanation:

The one that weighs the less is 80

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2 years ago
Read 2 more answers
A lake contains 4 distinct types of fish. Suppose that each fish caught is equally likely to be any one of these types. Let Y de
strojnjashka [21]

Answer:

a) P(μ-k*σ≤ Y ≤ μ+k*σ ) ≥ 0.90

a= μ-3.16*σ , b= μ+3.16*σ

b) P(Y≥ μ+3*σ ) ≥ 0.90

b= μ+3*σ

Step-by-step explanation:

from Chebyshev's inequality for Y

P(| Y - μ|≤ k*σ ) ≥ 1-1/k²

where

Y =  the number of fish that need be caught to obtain at least one of each type

μ = expected value of Y

σ = standard deviation of Y

P(| Y - μ|≤ k*σ ) = probability that Y is within k standard deviations from the mean

k= parameter

thus for

P(| Y - μ|≤ k*σ ) ≥ 1-1/k²

P{a≤Y≤b} ≥ 0.90 →  1-1/k² = 0.90 → k = 3.16

then

P(μ-k*σ≤ Y ≤ μ+k*σ ) ≥ 0.90

using one-sided Chebyshev inequality (Cantelli's inequality)

P(Y- μ≥ λ) ≥ 1- σ²/(σ²+λ²)

P{Y≥b} ≥ 0.90  →  1- σ²/(σ²+λ²)=  1- 1/(1+(λ/σ)²)=0.90 → 3= λ/σ → λ= 3*σ

then for

P(Y≥ μ+3*σ ) ≥ 0.90

5 0
3 years ago
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