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2 years ago

8

Bik was working on memorizing her multiplication facts. she noticed that anytime she multiplied a number by 1, she got the same

number she started with. what property allows this to be true?

1 answer:

ser-zykov [4K]2 years ago

8 0

Answer:

The multiplicative identity property allows this to be true.

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What is the opposite of 4.3

enyata [817]

-4.3 the opposite of any number is just it’s negative

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2 years ago

Who wants to ch.at(;

Gre4nikov [31]

Answer:

ok

Step-by-step explanation:

i said ok

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2 years ago

A sample of 16 small bags of the same brand of candies was selected. Assume that the population distribution of bag weights is n

Olegator [25]

Answer:

i) $2 - 1.64 \frac{0.1}{\sqrt{16}}= 1.959$

$2 + 1.64 \frac{0.1}{\sqrt{16}}= 2.041$

So then the 90% confidence interval is given by (1.959, 2.041)

ii) Figure attached

iii) $ME= 1.64 *\frac{0.1}{\sqrt{16}}= 0.041$

Step-by-step explanation:

Previous concepts

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".

The confidence interval is given by this formula:

$\bar X \pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}}$ (1)

And for a 90% of confidence the significance is given by $\alpha=1-0.9=0.1$ , and $\frac{\alpha}{2}=0.05$ . Since we know the population standard deviation we can calculate the critical value $z_{0.05}= \pm 1.64$

We know the folllowing data:

$\bar X = 2$ represent the sample mean

$\sigma = 0.1$ represent the population deviation

n =16 represent the sample size

Part i)

If we replace the values given into formula (1) we got:

$2 - 1.64 \frac{0.1}{\sqrt{16}}= 1.959$

$2 + 1.64 \frac{0.1}{\sqrt{16}}= 2.041$

So then the 90% confidence interval is given by (1.959, 2.041)

Part ii)

Figure attached. We have the illustration for the confidence interval obtained.

Part iii)

The margin of error is given by:

$ME=z_{\alpha/2} \frac{\sigma}{\sqrt{n}}}$

And if we replace we got:

$ME= 1.64 *\frac{0.1}{\sqrt{16}}= 0.041$

3 0

3 years ago

Watch help video

alisha [4.7K]

Answer:

- 179 ft

Step-by-step explanation:

Start elevation is 0 ft

Change of position after 50 seconds

50*4.5 = 225 ft

Elevation now

0 - 225 = - 225 ft

Change of position after 92 seconds

92*0.5 = 46 ft

Final elevation

- 225 + 46 = - 179 ft

5 0

2 years ago

Simplify 42 ⋅ 48 thanks

Andreyy89

42•48=2,016. Hope this helped!

4 0

2 years ago