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Olegator [25]
3 years ago
11

What what scientists do that is the basis for their investigation word that mean that

Mathematics
1 answer:
Licemer1 [7]3 years ago
5 0
Scientist conduct experiments in order to do their investigation.
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What the missing number
leonid [27]

the answer is -4

hope it helpsss


4 0
4 years ago
Read 2 more answers
(-y+5•3)+7.2y-9)=6.2y+n
kramer
(-y+5x3)+(7.2y-9)=6.2y+n
(-y+15)+(7.2y-9)=6.2y+n
since you're adding the two parentheses, you don't need to have them there
-y+15+7.2y-9=6.2y+n
7.2y-y +15-9 =6.2y+n
6.2y + 6 =6.2y+n
6.2y - 6.2y -n = -6
-n=-6
n=6

3 0
3 years ago
In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi
lana [24]

Answer:

Confidence interval:  (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

\bar{x} = 1858 \text{ kWh}

Population standard deviation =

\sigma = 450 \text{ kilowatt-hours}

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)

6 0
3 years ago
At summer camp, campers were asked to name their favorite sport. The circle graph shows the percent of campers who preferred eac
vladimir1956 [14]

I would say 260

Hope I helped

:)

5 0
3 years ago
Read 2 more answers
Using fraction bar to find sum for 1/3 1/3 1/6
PIT_PIT [208]
1/3 1/3 1/6= 1+1=2/6 1/6=3/6 simply it to 1/2
8 0
3 years ago
Read 2 more answers
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