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nadya68 [22]
3 years ago
10

Is 40,100 divisible by 10?

Mathematics
2 answers:
ozzi3 years ago
7 0

Answer:

C

Step-by-step explanation:

Any number with a 0 at the end is divisible by 10

kompoz [17]3 years ago
6 0
The answer is C. Ever time you see a number that ends with 0 it is divisible by 10.
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A researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic
Delvig [45]

Answer:

90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

Step-by-step explanation:

We are given that a researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic meter with a standard deviation of 0.093.

Firstly, the pivotal quantity for 90% confidence interval for the population mean iron concentration is given by;

         P.Q. = \frac{\bar X - \mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, \bar X = sample mean iron concentration = 0.802 cc/cubic meter

             s = sample standard deviation = 0.093

             n = number of water samples = 27

             \mu = population mean

<em>Here for constructing 90% confidence interval we have used t statistics because we don't know about population standard deviation.</em>

So, 90% confidence interval for the population mean, \mu is ;

P(-1.706 < t_2_6 < 1.706) = 0.90  {As the critical value of t at 26 degree of

                                                 freedom are -1.706 & 1.706 with P = 5%}

P(-1.706 < \frac{\bar X - \mu}{\frac{s}{\sqrt{n} } } < 1.706) = 0.90

P( -1.706 \times {\frac{s}{\sqrt{n} } } < {\bar X - \mu} < 1.706 \times {\frac{s}{\sqrt{n} } } ) = 0.90

P( \bar X -1.706 \times {\frac{s}{\sqrt{n} } < \mu < \bar X +1.706 \times {\frac{s}{\sqrt{n} } ) = 0.90

<u>90% confidence interval for</u> \mu = [ \bar X -1.706 \times {\frac{s}{\sqrt{n} } , \bar X +1.706 \times {\frac{s}{\sqrt{n} } ]

                                                 = [ 0.802 -1.706 \times {\frac{0.093}{\sqrt{27} } , 0.802 +1.706 \times {\frac{0.093}{\sqrt{27} } ]

                                                 = [0.771 , 0.832]

Therefore, 90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

4 0
3 years ago
If four times a number plus 3 is 11, what is the number
garri49 [273]
4x + 3 = 11
4x = 11 -3
4x = 8
x =8/4
x =2

answer
the number is 2
3 0
3 years ago
Read 2 more answers
You order a pizza for dinner
ch4aika [34]
The radius is half the diameter. So the diameter is 14.
7 0
3 years ago
Solve the formula c = 1.06p for p, where c is the cost of an item at Shopping City, including tax, and p is the selling price. (
jek_recluse [69]

Answer:

Step-by-step explanation:

I honestly don't know

4 0
3 years ago
One third of the students in mes. Monroe’s class have pets. One half of these pets are dogs. What part of the students have dogs
Daniel [21]

Answer:

1/6

Step-by-step explanation:

1/3 times 1/2 = 1/6

6 0
3 years ago
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