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34kurt
3 years ago
14

PLEASE HELP EXTRA POINTS / WRONG ANSWERS WILL BE REPORTED

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0

Q1. The limit from the right is -4. (The limit from the left, and the value of f(3) are different, but that doesn't matter for the question asked. Taken together, they mean that the limit as x approaches 3 does not exist. But that is not the question asked.)


Q2. f(x) = 4/x.

f'(x) = -4/x^2, so f'(2) = -4/2^2 = -1.


Q3. Since the denominator is zero at x=7, the only answer choice that makes any sense is the first one:

-∞; x = 7

It also happens to be the right one.

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The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident th
Aleks04 [339]

Answer:

The minimum sample size that can be taken is of 14 dogs.

Step-by-step explanation:

The formula for calculating the minimum sample size to estimate a population mean is given by:

n=\frac{z^{2}\sigma^{2}}{e^{2}}

The <u>first step</u> is obtaining the values we're going to use to replace in the formula.

Since we want to be 95% confident, 1-\alpha=0.95 \Rightarrow \alpha=0.05.

Therefore we look for the critical value z_{\alpha/2}=1.96.

Then we calculate the variance:

\sigma = 3.7 \Rightarrow \sigma^{2}=13.69

And we have that:

e=2 \Rightarrow e^{2}=4

<u>Now</u> we replace in the formula with the values we've just obtained:

n=\frac{1.96^{2}*13.69}{4}=13.1479\approx 14

Therefore the minimum sample size that can be taken to guarantee that the sample mean is within 2 inches of the population mean is of 14 dogs.

6 0
3 years ago
I really need help here !!:c
shepuryov [24]

Answer: 5.6^{3}+0.6^{2}+2.^{1}+4.6^{0}

which will be 1096 in base 10

Step-by-step explanation:

5024_{six} in expanded form to base 10 will be :

5.6^{3}+0.6^{2}+2.^{1}+4.6^{0}

which will be

5(216)+0(36)+2(6)+4(1)

⇒1080+0+12+4

= 1096

7 0
4 years ago
List all the factors of 27.
monitta

Answer:

The factors for 27 are 1,27,3,9

5 0
3 years ago
Read 2 more answers
Four mathematicians, three physicists, and an engineer are to be seated equally spaced around a circular table. How many differe
Vesna [10]

First, we can choose the seats for the four mathematicians.  Then we seat the physicits, then the engineer.  There are 4! ways to seat the mathematicians, then 3! ways to seat the physicists, then 1! ways to seat the engineer.  But then we must divide by 8, because we can rotate the table, so there are 8!*4!*3!/8 = 725760 ways to seat everyone.

3 0
3 years ago
(10-3)*2+(5-14/2 help
Dafna11 [192]
2(10-3) distribute = 2*10 is 20 and 2*3 is 6
20-6+(5-14/2)
now 20-6 is 14
14+(5-14/2)
now 14/2 is 7
14+(5-7)
now 5-7 is -2
14+-2
is 12 
the answer is 12
but if you want to you can do 12/3 to get the greatest common factor 
which is 4
hope i help you :P 
6 0
3 years ago
Read 2 more answers
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