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evablogger [386]
3 years ago
15

In a normal distribution, what is the probability that a randomly selected data value will fall within two standard deviations o

f the mean? Give your answer as a whole number percent.
Mathematics
1 answer:
Zepler [3.9K]3 years ago
5 0
The answer is 95%

This is something you should memorize. Specifically it is from the Empirical Rule (or 68-95-99.7 rule) which gives rough approximations of areas under the curve. 
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I NEED THIS DONE ASAPPPP<br> expand 4(m+2)<br><br> 4(m+2) =
77julia77 [94]

4(m + 2) expanded is 4 x m and 4 x 2

simplified: 4m + 8

3 0
3 years ago
Solve for t: t ÷ 5 = 8
DIA [1.3K]

Answer:

Step-by-step explanation:

Equation is t÷5=8

first you multiply 5 on each to cancel it out

t÷5*5=8*5

solve to get

t=40

8 0
3 years ago
Complete the table by converting each decimal to a fraction.<br> Will mark brainliest
Gelneren [198K]
0.31..= 31/100
0.215..=43/200
0.6704..=419/625
• I hope this helped you, and if you want to see if my answers are correct, simply divide the fractions and see if you’re gonna get the decimals.
8 0
3 years ago
A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 7% vinegar, and the second brand co
Lina20 [59]

Answer: There is 162 ml of first brand and 108 ml of second brand.

Step-by-step explanation:

Since we have given that

Percentage of vinegar that the first brand contains = 7%

Percentage of vinegar that the second brand contains = 12%

Percentage of vinegar in mixture = 9%

Total amount of dressing = 270 ml

We will use "Mixture and Allegation":

First brand                  Second brand

     7%                                12%

                       9%

--------------------------------------------------------

12%-9%             :                9%-7%

 3%                   :                    2%

So, ratio of first brand to second brand in a mixture is 3:2.

So, Amount of first brand she should use is given by

\dfrac{3}{5}\times 270\\\\=162\ ml

Amount of second brand she should use is given by

\dfrac{2}{5}\times 270\\\\=108\ ml

Hence, there is 162 ml of first brand and 108 ml of second brand.

4 0
3 years ago
Graph y=3x^2-5 and its inverse
zhenek [66]

The inverse is more complicated to graph.

But you can try I have provided you the equation.

6 0
3 years ago
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