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Aleks04 [339]
3 years ago
12

The population of a particular country was 26 million in 1981; in 1990, it was 31 million. the exponential growth function descr

ibes the population of this country t years after 1981. use the fact that 9 years after 1981 the population increased by 5 million to find k to three decimal places.
Mathematics
1 answer:
yuradex [85]3 years ago
5 0
Just use syblol it is verygood for varible form 
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Weight of a rock: In a geology course, students are learning to use a balance scale to accurately weigh rocks. One student plans
statuscvo [17]

Answer:

The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.

Step-by-step explanation:

What is Confidence Interval?

The confidence interval represents an interval that we can guarantee that the target variable will be within this interval for a given confidence level.  

The confidence interval is given by

CI = \bar{x} + t_{\alpha/2}(\frac{\sigma}{\sqrt{n} } ) \\

Where \bar{x} is the mean weight \sigma is the standard deviation t_{\alpha/2} is the critical value from t-table and n is the sample size.

The term t_{\alpha/2}(\frac{\sigma}{\sqrt{n} } ) is known as margin of error.

As the sample size is decreased the corresponding margin of error increases which results in wider confidence interval which means smaller precision.

The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.

We can say with 95% confidence that the true mean weight of the rock is within the interval of (25.2, 29.1).

7 0
3 years ago
Which line has a y-intercept of –2?<br> A ℓ<br> C t<br> B p<br> D both ℓ and t
Troyanec [42]

I can't answer this question without a picture of the lines.

6 0
3 years ago
An equation is modeled. What value of x makes the equation true? Explain.
nirvana33 [79]

Answer:

B: x=-1

Step-by-step explanation:

5x+6=1

5x+6-6=1-6

simplify

divide by 5 on both sides

x=-1

4 0
3 years ago
Am stuck on this question and number 2 please HELP
Mekhanik [1.2K]

√2 amount around 1.4

so the best answer is < which means 'less than'

√2 < 1.8

√2 is less than 1.8

7 0
3 years ago
Read 2 more answers
-30 + 14.7<br><img src="https://tex.z-dn.net/?f=%20-%2030%20%2B%2014.7" id="TexFormula1" title=" - 30 + 14.7" alt=" - 30 + 14.7"
Murrr4er [49]

Answer:

-15.3


Step-by-step explanation:


8 0
3 years ago
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