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Furkat [3]
3 years ago
11

A population of 7000 fish experiences 1,000 deaths in a year. what is the population's death rate for that year?

Mathematics
2 answers:
ICE Princess25 [194]3 years ago
3 0
Rate is the number of death over time. So 1000 divide by 365 days =2.78
Vedmedyk [2.9K]3 years ago
3 0

Answer:

14.29%

Step-by-step explanation:

The death rate for that year will be the year percent decrease in the population of fish.

Initial population of fish = 7000fishes

Death of fish for the year = 1000fishes

death rate for the year = amount of death of fish for that year/initial population of fish × 100%

Yearly death rate = 1000/7000×100%

= 14.29%

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How do you solve -2(3x-1)-3=4x+5-x
maria [59]

Answer:

-6x+2-3=3x+5

2-3-5=3x+6x

-6=9x

x=-2/3

4 0
3 years ago
The average household income for a recent year was $30,000. five years earlier the average household income was $24,500. assume
ikadub [295]

Using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

According to the question,

The average household income for a recent year (x₁⁻) = $30,000

The average household income for a recent year (x₂⁻) = $24,500

sample sizes n₁ = n₂ = 34

standard deviation of both samples were $24,500. Thus, s₁ = s₂ = $5928.

Null hypothesis:  There is no evidence to believe that the average household income has increased.

H₀ : μ₁ ≤ μ₂

Alternative hypothesis:  There is evidence to believe that the average household income has increased.

H₁: μ₁ > μ₂  

To check hypothesis we have the formula

Standard error=  \sqrt{\frac{s_{1} ^{2} }{n_{1} } + \frac{s^{2} _{2} }{n_{2} }  }

= \sqrt{2067128.4706}

= 1437.7512

Thus, standard error is $1437.7512.

Formula for test statistic = [(x₁⁻ -  x₂⁻) - (μ₁ - μ₂)]/standard error

= [(30000 -  24500) - 0]/1437.7512

= 3.8254

The critical value of z at 5% level of significance is 1.6449.

Here, the calculated value is greater than the critical value so we reject H₀.

Hence using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

Learn more about hypothesis test here

brainly.com/question/15060525

#SPJ2

3 0
2 years ago
Pleasee heelpp mee!!!! thank you:)
Studentka2010 [4]
I might not be right but i think it’s 104
8 0
2 years ago
Read 2 more answers
The shardze family is planning A car trip to Atlanta Georgia which is 279 miles from their home they plan to drive at an average
Gnoma [55]
They are going 279 miles at a rate of 62 mph.

time = distance / speed
time = 279/62
time = 4.5 hrs...or (4 hrs 30 minutes)

plus they plan on a 45 minute lunch...
4 hrs and 30 minutes + 45 minutes = 4 hrs and 75 minutes = 
5 hrs 15 minutes. So they need 5 hrs and 15 minutes to get there...and they want to be there by 3.

So they will have to leave at : 9:45 <==
4 0
3 years ago
What is the difference? Write the difference. 8-2=6
guajiro [1.7K]
The difference is 6 because it is what we get when we subtract 8 and 2.

Final answer: 6
7 0
3 years ago
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