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makvit [3.9K]
3 years ago
6

Use the diagrams below to derive the formula for the volume of a hemisphere.

Mathematics
1 answer:
Zigmanuir [339]3 years ago
5 0

Answer:

2/3 \pir²

Step-by-step explanation:

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A cell phone company charges $55 per month for unlimited minutes plus $0.25 per text sent. If the charges to Dayne's cell phone
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A: 180
Subtract 100 - 55 which gets you 45 then divide that with .25 = 180 
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A school drama club has 50 members . Of those students , 35% of the members are seventh graders . How may drama club members are
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Find the mean and standard deviation for the set of data. {22,21,20,4,19,6,24,11,26} A. mean: 17; standard deviation: 8.1 B. mea
Kruka [31]

Using it's concepts, the mean and the standard deviation of the data-set are given as follows:

B. mean: 17; standard deviation: 7.53.

<h3>What are the mean and the standard deviation of a data-set?</h3>

  • The mean of a data-set is given by the <u>sum of all values in the data-set, divided by the number of values</u>.
  • The standard deviation of a data-set is given by the <u>square root of the sum of the differences squared between each observation and the mean, divided by the number of values</u>.

The mean for this problem is:

M = (22 + 21 + 20 + 4 + 19 + 6 + 24 + 11 + 26)/9 = 17

The standard deviation is:

S = \sqrt{\frac{(22-17)^2+(21-17)^2+(20-17)^2+(4-17)^2+(19-17)^2+(6-17)^2+(24-17)^2+(11-17)^2+(26-17)^2}{9}} = 7.53

Hence option B is correct.

More can be learned about the mean and the standard deviation of a data-set at brainly.com/question/28048096

#SPJ1

7 0
1 year ago
Which of the following two statements is true regarding correlation? Correlation is a qualitative measure of the strength of a l
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correlation can be used to determine the direction of the relationship between two variables may be this is the answer not sure

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1. Juanita is thinking of two positive whole
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Answer:

i believe its seven combinations

Step-by-step explanation:

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