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Leto [7]
3 years ago
14

HELP ME PLEASEEEEEEEEEEEEEEEEE

Mathematics
1 answer:
melisa1 [442]3 years ago
3 0
2 2/3
Answer: because that is the answer
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Identify the percent of change as an increase or a decrease.<br><br> 1/4 to 1/2
rusak2 [61]
Increase.

1/4 can be translated to 25%

1/2 can be translated to 50%

25% to 50% is an increase.
4 0
3 years ago
Read 2 more answers
If you want to be 95​% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard
Aleksandr [31]

Answer:

The sample size required is at least 171

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

What sample size is​ required?

A samle size of at least n is required, in which n is found when M = 3, \sigma = 20

So

M = z*\frac{\sigma}{\sqrt{n}}

3 = 1.96*\frac{20}{\sqrt{n}}

3\sqrt{n} = 20*1.96

\sqrt{n} = \frac{20*1.96}{3}

(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}

n = 170.7

Rouding up

The sample size required is at least 171

5 0
3 years ago
Find the value of x in the figure below:
KIM [24]

Answer:

let remaining angle in heptagon be a.

a+64=180(linear pair)

a=116

again

x+155+90+163+a+121°=720(sum of interior angle of hexagon is (6-2)×180°)

x+529+a=720

x+116=720-529

x=191-116=75

5 0
3 years ago
Why might a person need an emergency fund?
neonofarm [45]
Why An Emergency Fund<span> Is Important. People who've had large and unforeseen expenses arise can probably either tell you how happy they were that they had</span>emergency fund<span>s, or how difficult it was to find the money to cover expenses.</span>
4 0
4 years ago
4 gallons of paint cost a total $22.00. How much will 14 gallons cost? A. $60.50 B. $242.00 C. $82.00 D. $77.00
Nana76 [90]
The answer is D. $77.00. To get the cost for a single gallon you divide $22 by 4 gallons you get $5.50. To get the cost for 14 gallons you multiply $5.50 by 14 and you get the answer $77.00.
4 0
3 years ago
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