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Charra [1.4K]
3 years ago
11

The number of different cars sold in some country rose from 210 in 1997 to 277 in 2007. Find the percent increase. Round to the

nearest whole percent.
Mathematics
1 answer:
Virty [35]3 years ago
4 0

Find percent increase by subtracting the amounts and dividing it by the old amount, then multiply the result by 100 to make it a percent.

Increase= (277-210)/210

67/210

Then it ends up as 0.319047619...

Multiply that by 100 to make it a percent, which is..

31.9047619..

Round it off, and you get..

32%!

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A botanist collected one leaf at random from each of 10 randomly selected mature maple trees of the same species. The mean and t
Zarrin [17]

Answer:

One sample t-test for population mean would be the most appropriate method.

Step-by-step explanation:

Following is the data which botanist collected and can use:

  • Sample mean
  • Sample Standard Deviation
  • Sample size (Which is 10)
  • Distribution is normal

We have to find the best approach to construct the confidence interval for one-sample population mean. Two tests are used for constructing the confidence interval for one-sample population mean. These are:

  • One-sample z test for population mean
  • One-sample t test for population mean

One sample z test is used when the distribution is normal and the population standard deviation is known to us. One sample t test is used when the distribution is normal, population standard deviation is unknown and sample standard deviation is known.

Considering the data botanist collected, One-sample t test would be the most appropriate method as we have all the required data for this test. Using any other test will result in flawed intervals and hence flawed conclusions.

Therefore, One-sample t-test for population mean would be the most appropriate method.

8 0
4 years ago
An initial population if 1000 starfish double each year for 4 years. What is the population after 4 years?
Zolol [24]

Answer:

16,000 starfish

Step-by-step explanation:

year 0: 1000

year 1: 2000

year 2: 4000

year 3: 8000

year 4: 16000

8 0
3 years ago
Need help test is due 3/10/18
Kazeer [188]
I believe <span>angle 1 is 115° </span>
8 0
3 years ago
How do you answer the picture below?
3241004551 [841]

Answer:

42cm²

Step-by-step explanation:

because if the perimeter of the rectangle is 28 then the length is 5, 5 - 11 = 6, the formula for finding the trapezium is to add the 2 parallel sides, half them, then times them with the length so your sum will look like this, 5+9=14, (i knew the other side was 9 as the length of AB is the same as the length of FC, which is the one of the parallel sides of the trapezium) then we do 14÷2=7, finally we times 7 by 6 which is 42cm²

3 0
3 years ago
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agasfer [191]

Answer:

she will have read 15 books in all

Step-by-step explanation:

if she has read 10 books in 2 months that means she has read 5 books each month, because 10 ÷ 2 = 5.

so if another month passes by that means she reads another 5 books.

10 + 5 = 15

so in total britney has read 15 books in total

7 0
4 years ago
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