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Alchen [17]
3 years ago
13

The tree frog population in your back yard doubles every two weeks. Currently, there are 10 frogs in your back yard. Assuming th

at there are 4 weeks in a month how many tree frogs will there be in 3 months?
Mathematics
2 answers:
Minchanka [31]3 years ago
6 0
There should be 80 but I'm not 100%.......
sergiy2304 [10]3 years ago
3 0

Answer:

640

Step-by-step explanation:

So we want to know how many frogs will there be in 3 months if the frog population doubles every two weeks and there are 10 frogs in the start. So lets see how many weeks are there in 3 months if there is 4 weeks in one month: 3 * 4 weeks = 12 weeks. So every two weeks the population doubles and that means the population will double 6 times in 12 weeks. 20 + 40 + 80 + 160 + 320 640 = 1260 frogs.

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6. To predict the annual rice yield in pounds we use the equation y-hat = 859 + 5.76x1 + 3.82x2 where x1 represents the number o
zysi [14]
The yield is given by the regression equation
y = 859 + 5.76x₁ + 3.82x₂ 
where
x₁ = number of acres planted
x₂ = number of acres harvested

The goodness of fit is r² = 0.94.
This appears to a very good fit to the data because it is almost equal to 1.
To assess the goodness of fit in a statistical sense, it may also necessary to perform an F-test in a hypothesis test. This is not possible without having raw measured data.
For this problem, r²=0.94 may be considered to be a very good fit to the measured data.

Part a.
When x₁ = 3200 acres and x₂ = 3000 acres, obtain
y = 859 + 5.76*3200 + 3.82*3000
   = 30,751 pounds

Part b.
Without performing a hypothesis test or a residual plot, we can conclude that the predicted value is in very good agreement with the actual value.

Because we do not have raw measured data, we can neither plot the residuals nor perform a hypothesis test.

In general,
When r² = 1, the agreement is exact.
When r² = 0, there is absolutely no agreement.
A value of r² > 0.9 is considered good.


3 0
3 years ago
The local newspaper has letters to the editor from 10 people. If this number represents 4% of all of the newspaper's readers, ho
Alex787 [66]

Answer:

The local newspaper has 250 readers in total

Step-by-step explanation:

Given that

Letter to the editor = 10

Also it is given that 10 is the 4% of total readers of the newspaper.

Let x be the number of readers of the newspaper

It can be written as:

10 = 4\%\ of\ x

Converting the percentage into decimal

10 = 0.04x\\\frac{10}{0.04} = \frac{0.04x}{0.04}\\x = 250

The newspaper has 250 readers.

Hence,

The local newspaper has 250 readers in total

6 0
3 years ago
Write the numbers in order from least to greatest. 23458, 23621, 23211, 23201
rosijanka [135]
23201, 23211, 23458, 23621
7 0
3 years ago
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Vinvika [58]

The correlation coefficient for the data in the table was found to be 0.93.

The correct option is A.

<h3>What is the correlation coefficient?</h3>

The correlation coefficient focuses on the linear relationship between two variables.

Given

The first column is labeled time spent at the dentist (in hours) with entries 1.4, 2.7, 0.75, 1.6.

The second column is labeled bill amount (in dollars) with entries 235, 867, 156, 215.

The numbers between -1 and 1 should be one of the values related to the bill.

Taking the independent variable or input variable as, the time a patient spends at the dentist and the dependent variable or output variable as the amount of the bill.

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To know more about correlation coefficient click the link given below.

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2 years ago
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Answer:

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