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son4ous [18]
2 years ago
5

1. The range tells you about the values in the middle 50 percent of the data set. True False

Mathematics
1 answer:
rosijanka [135]2 years ago
4 0
Trueeeeeeeeeeeeeeeeeeeeeeeeeeeee
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The diagram shows the cross-section of a wall of a cinema.
Anna71 [15]

Answer:

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Step-by-step explanation:

The area of the wall is the sum of the areas of the different sections of the wall. The cost to paint it will be the product of the cost of a tin of paint and the number of tins required.

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Here, the shape of the wall can be divided into two trapezoids and a rectangle. Each shape has a corresponding area formula. Left-to-right, their areas are ...

<u>Left Trapezoid</u>

  A = 1/2(b1 +b2)h

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  A = LW

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<u>Right Trapezoid</u>

  A = 1/2(b1 +b2)h

  A = 1/2(11 m +8 m)(10 m) = 95 m²

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The total area to be painted is the sum of the above areas:

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The area that needs to be painted is 280 m².

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A tin of paint covers 15 m², so the number of tins needed is ...

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  t = 280/15 = 18 2/3 . . . . . . divide by the coefficient of t

We can only buy whole tins, so we need to buy 19 tins. Their cost will be ...

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It will cost £133 to paint the wall.

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3 years ago
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