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otez555 [7]
2 years ago
13

What digit does B represent? What digit does C represent?

Mathematics
1 answer:
Ganezh [65]2 years ago
5 0
453 + 557 = 1010

P = 0
B = 5 <==
C = 3 <==
Q = 1
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A fast food restaurant executive wishes to know how many fast food meals adults eat each week. They want to construct a 98% conf
adelina 88 [10]

Answer:

n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337

So the answer for this case would be n=1337 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma=1.1 represent the population standard deviation

n represent the sample size  

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got z_{\alpha/2}=2.326, replacing into formula (b) we got:

n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337

So the answer for this case would be n=1337 rounded up to the nearest integer

3 0
3 years ago
A=pt+q<br> p= -1, t=4 and q=6<br> work out the value of a
77julia77 [94]

Answer:

a = 2

Step-by-step explanation:

a = pt + q

p = -1

t = 4

q = 6

a = -1(4)+6

a = -4+6

a = 2

8 0
3 years ago
What should the balance be in Diane's register?<br><br> Will give BRAINLIEST
MArishka [77]

Answer:

The balance of Dianne's register should be $359.41

Step-by-step explanation:

We can begin at the ending balance on the bank statement at $578.30

Then a check is written for $219.25, so a debit

Next a deposit is made for $140.36, so a credit

Then a withdrawal is made for $140.00, so a debit

This means we can make the equation

578.30-219.25+140.36-140.00=359.41

3 0
2 years ago
Help me please, I’ll mark brainliest
Lesechka [4]
I know that
20. 15
21. 18

Good luck though I remember doing it
8 0
3 years ago
Please help SO CONFUSED
gulaghasi [49]

Answer:

SOH-CAH-TOA

h = \sqrt{ 9^{2} +5^{2} }

~~~~~~~~~~

H= \sqrt{106}

O= 5

A= 9

~~~~~~~~~~~~~~~~

Sin = \frac{5}{\sqrt{106 }  }

Cos= \frac{9}{\sqrt{106 }  }

Tan = \frac{5}{9  }

Step-by-step explanation:

5 0
2 years ago
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