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8090 [49]
3 years ago
14

4. Nguyen is decorating the room for her sister's baby shower party. She is wrapping

Mathematics
1 answer:
Marianna [84]3 years ago
7 0

Answer:

Step-by-step explanation:

Given the information of the conical hat

  • diameter of 16 inches => Radius = 8 inches
  • height of 9 inches

=> the slant height of the hat is (use Pythagorean Theorem)

s^{2} = r^{2} + h^{2}

<=> s^{2} = 8^{2} + 9^{2}

<=> s = \sqrt{145}  

The area (without the base area) of tissue paper will she need to make one hat is:

SA = πrs  in2

<=> SA =  π*8*\sqrt{145}  in2

<=> SA =8 \sqrt{145} π

=> the total tissue paper will she need for 21 hats is:

SA*21

= 8 \sqrt{145} π*21

= 6352,18 in 2

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In statistics, mean is the average in a set of data collected. To calculate the mean, you have to add up all the numbers in the table and divide it by the number of data that exists. For example, if the data set is 2 4 1 5 2 8, the mean will be:

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So, for this data set, the mean is 3.6.

The median is also a average number, however, the median is the middle value in the list. For example, with the data set above, the median is 3, because, as the set has an even number of data, the middle term would be the mean of the two middle number, in other words:

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σ = 2.36.

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