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natima [27]
2 years ago
11

Just number 16#. Please reply asap.

Mathematics
1 answer:
const2013 [10]2 years ago
7 0
I think the diameter=8.94 or to the nearest cm is 9, radius=4.47 or  to the nearest cm is 5.
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a girl went to school for the first time and asked her how old are you the girl said I don't know but I know my mother's age is
elena55 [62]

Answer:

Nw how old is the girl, her mum & her dad?

let x=xmum's age

x+5=dad's age

x/2 =girl's age

x+x+5+x/2=100

3.5x=95

xmum's age=38

dad's age=43

girl's age=19

3 0
3 years ago
The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy
r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

Step-by-step explanation:

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, we have. This is the sample size subtracted by 1. So

df = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34

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 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0
2 years ago
What is the percentage of 12(1.33)?
Alexus [3.1K]
9.022556390 is 12/ 1.33
8 0
3 years ago
Which of the following is two-dimensional and infinitely large?
Makovka662 [10]

Answer:

D. A solid

Step-by-step explanation:

4 0
3 years ago
At Marco's school, 5/8 of the students are in the band. What percent of the students are in the band?
Harman [31]
62.5%

5/8 = 0.625 then multiply by 100% to get in terms of percent of 62.5%
7 0
2 years ago
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