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Romashka [77]
3 years ago
10

The mean of the data is 18.25 find the variance

Mathematics
2 answers:
bogdanovich [222]3 years ago
5 0
Variance= 4.2
Standard deviation = 2.12
photoshop1234 [79]3 years ago
3 0

Answer: Variance 4.5

Standard deviation 2.12

Step-by-step explanation:

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The exchange rate at the post office is £1=€1.17 how many euros will you get for £280
4vir4ik [10]

Question

The exchange rate at the post office is £1=€1.17 how many euros will you get for £280


Answer:

<h2>327.6 €</h2>

Step-by-step explanation:

you can solve with an equation

1£ : 1.17€ = 280£ : x

1 : 1.17 = 280 : x

x = 1.17 * 280 : 1

x = 327.6

-------------------

check

1 : 1.17 = 280 : 327.6

0.85 = 0.85

the answer is good

------------------------------------

or you can simpy solve with a multiplication

280 * 1.17 = 327.6



4 0
3 years ago
The amount of workers varies inversely with the time, in days, to complete a project. Five workers can complete a certain projec
Feliz [49]

9514 1404 393

Answer:

  8

Step-by-step explanation:

The number of days has gone down by a factor of 15/24. The number of workers is inversely proportional, so must increase by a factor of 24/15 = 8/5.

  (5 workers) × (8/5) = 8 workers

8 workers are needed to complete the project in 15 days.

6 0
3 years ago
The tables give the price of a kayak rental from two different companies.
Mkey [24]

Answer:

after five hours,

Step-by-step explanation:

I do not know if that is right hope that helps

6 0
3 years ago
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What times itself 3 times equals -27
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Answer:

the answer for 3 times -27 is -81

Step-by-step explanation:

hope it helped ! :)

4 0
3 years ago
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The volume of a rectangular pyramid is 120 cubic centimeters. The base is 12
svlad2 [7]

Answer:The volume of a rectangular pyramid is 120 cubic centimeters. The base is 12 centimeters long and 5 centimeters wide. What is its height?

A.2

Step-by-step explanation: so rember try your best

5 0
3 years ago
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