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BARSIC [14]
4 years ago
9

Savanna had 40 iris blooms last year. This year, she had 15% percent more iris blooms.

Mathematics
1 answer:
11Alexandr11 [23.1K]4 years ago
7 0
I believe she had 6 more iris blooms than last year
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What is the mad of these set of numbers- 0,0,0,0,0,0,1,1,1,1,1,1,2,2,2,2,2,2,2,3,4,4
matrenka [14]
I got .991. The mean was 1.4 so I subtracted 1.4 from each number even if I had to do it more than once. I took the absolute value of each number and added them. The sum was 21.8. I then divided 21.8 by 22 and got .99090(90 repeated)
4 0
3 years ago
Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wood
Stells [14]

<u>Answer with explanation:</u>

As per given , we have

A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72.

i.e. n= 50

Degree of freedom = n-1=49

\overline{x}=3.1\ mm

s=0.72\ mm

The point estimate of the population mean is equals to the sample mean.

i.e. The best estimate for the length of gribbles= 3.1 mm

Also, population standard deviation is unknown , then the confidence interval would be :

E=t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}

For df= 49 and significance level of 0.05 , the t- value (using t-distribution table) would be :

t_{0.05/2, 49}=t_{0.025, 49}= 2.010

Now, Margin of error : E=(2.010)\dfrac{0.72}{\sqrt{50}}

=0.204664986747\approx0.20

95% confidence interval : (\overline{x}-E,\ \overline{x}+E)

i.e.\ (3.1-0.20, 3.1+0.20)=(2.90,\ 3.30)

3 0
4 years ago
8-5x =2x + 20 <br> Simplify<br> I’ll give brainliest
kobusy [5.1K]

Answer:

X= - 12/7 i hope it is helpful have a nice day if you want steps i will show you

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Question 14 of 20 :
monitta

Answer:

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Step-by-step explanation:

-17 < -1

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Please help asap thank you
olga nikolaevna [1]

Answer:

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Step-by-step explanation:

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