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3 years ago

HELP DUE IN 10 MINS!

Mathematics

2 answers:

maria [59]3 years ago

5 0

Answer:

True and true

Step-by-step explanation:

I think this is symmetry, but if it’s not I’ll change my answer

DIA [1.3K]3 years ago

3 0

Answer:

9. not all of them are, so false

10. true

Step-by-step explanation:

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A model is 4.2 feet tall, the plywood used to make the model is 0.6 inch thick. How many sheets of plywood to make the model?

nadya68 [22]

Answer=84 sheets

4.2feet
1 foot=12 inches

4.2*12=50.4inches

50.4/0.6=84 sheets

4 0

3 years ago

Which number is prime? 63 51 61 57

kondor19780726 [428]

Hey there!

No numbers go into a prime number other than one and that number. 9 and 7 go into 63, so it’s not 63. 3 and 17 go into 51, so it’s not 51. 19 and 3 go into 57, so it’s not 57. That leaves 61. Nothing goes into this other than one and 61, so the answer is 61.

I hope this helps!

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3 years ago

Sample size: A researcher is trying to decide how many people to survey. Which of the following sample sizes will result in a co

oksian1 [2.3K]

Answer:

Step-by-step explanation:

Given that a researcher is trying to decide how many people to survey.

We have confidence intervals are intervals with middle value as the mean and on either side margin of error.

Confidence interval = Mean ± Margin of error

Thus confidence interval width depends on margin of error.

Margin of error = $Critical value *\frac{\sigma}{\sqrt{n} }$

Thus for the same confidence level and std deviation we find margin of error is inversely proportional to square root of sample size.

Hence for small n we get wide intervals.

So if sample size = 300, the researcher will get wider confidence interval

4 0

3 years ago

Given the following table, what is the average rate of change from 2 ≤ x ≤ 5 ?

AnnyKZ [126]

So you basically want us to answer for u anyway well it’ll be:
For 2< it’ll have to be something greater that two or 2 and then for <5 it’ll be the same so for example if it was like that I’ll do it like this: 3x5=15
Hope That Helped!

7 0

3 years ago

A pile of 10 000 paper is 89 cm thick. How thick is one sheet of paper?

Iteru [2.4K]

Answer:

0.0089 cm

Step-by-step explanation:

89/10 000

=0.0089

8 0

3 years ago