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exis [7]
3 years ago
9

I really need help on these two questions

Mathematics
1 answer:
Yuri [45]3 years ago
3 0
(4^\frac{1}{3} )^3 =4
(6^ \frac{1}{6} )^6 =6
(3^ \frac{1}{2} )^4 =
multiply \frac{1}{2} by 4 
and then simplify 
3^{2}

so it will be 
4x6x9=216
your answer is d.216
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X/-6= -20. What is x?
lesya692 [45]
The answer is x = 120
6 0
2 years ago
Read 2 more answers
In a study on the time that
krok68 [10]

The 95% confidence interval of the population mean, in years, is (4.3, 5.3). 4 years is not part of the confidence interval, which means that it contradicts the fact that 39% of students get their college degree in four years.

-----------------------------

To solve this question, we need to find the confidence interval for the amount of time it takes the students to get the degree.

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

-----------------------------

The first step to solve this problem is finding how many degrees of freedom,which is the sample size subtracted by 1. So

df = 80 - 1 = 79

-----------------------------

95% confidence interval

Standard level of confidence, we have to find a value of T, which is found looking at the t table, with 79 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 1.9905.

-----------------------------

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.9905\frac{2.2}{\sqrt{80}} = 0.5

In which s is the standard deviation of the sample and n is the size of the sample.

-----------------------------

The lower end of the interval is the sample mean subtracted by M. So it is 4.8 - 0.3 = 4.3 years.

The upper end of the interval is the sample mean added to M. So it is 4.8 + 0.3 = 5.3 years.

-----------------------------

The 95% confidence interval of the population mean, in years, is (4.3, 5.3). 4 years is not part of the confidence interval, which means that it contradicts the fact that 39% of students get their college degree in four years.

A similar question is given at brainly.com/question/24278748

6 0
2 years ago
Fiona is gathering signatures on a petition to save the Orangutans. If she gets 4 times the number of signatures that she has ri
Reika [66]

Answer: 2000

Step-by-step explanation:

Set up equation

The total signatures she needs is 4 times as many as she has. From this we can create the equation (4n = total signatures)

We know that the total number of signatures is 8000, so plug this into the equation to get 4n = 8000

Solve for n

Now that we have an equation, we can solve for n by dividing both sides by 4

4n = 8000

n = 8000 / 4 = 2000

Final Answer

Fiona has collected 2000 signatures so far

3 0
3 years ago
HELP ASAP! WILL GIVE BRAINLIEST!!
Deffense [45]

Answer:

26.635

Step-by-step explanation:

6.28, the area of the biggest circle

2.355, the area of the little circle

18, the area of rectangular

6.28+2.355+18

5 0
2 years ago
What type of power function is represented in the table?
Alisiya [41]
It is quadratic your welcome
7 0
3 years ago
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