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Vanyuwa [196]
3 years ago
12

Please i need this done

Mathematics
1 answer:
ohaa [14]3 years ago
7 0

Answer:

<em>if Petra uses a scale of 1 in = 50 miles, the distance of 400 miles would fit in the page.</em>

Step-by-step explanation:

<u>Scaling</u>

Objects can be represented in a reduced or augmented size by using scaling.

Scaling is essentially multiplying or dividing by a constant factor. We use scaling when representing geographic locations on a map.

Petra has a piece of paper that is 8.5 inches wide and 11 inches long and she wants to represent a distance of 400 miles by using the scale factor of 1 inch= 20 miles.

a)

Dividing the real distance by the scale factor we get 400/20 = 20 inches. Petra would need 20 inches of paper to represent the scaled distance. That distance won't fit in any direction of the paper, so she actually cannot make the scale drawing.

b)

To make the drawing, the distance of 20 inches should fit into the page in any orientation, let's assume it's done across the paper's width of 8.5 inches.

Dividing 400 / 8,5 = 47

This gives us an idea of the appropriate scale factor. We can use a round number like 50. Thus, if Petra uses a scale of 1 in = 50 miles, the distance of 400 miles would fit in the page.

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Answer:

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Step-by-step explanation:

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4x² - 8x + 3 = 0

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4 years ago
A national random sample of 654 women aged 20 – 29 years was taken, and each woman's body mass index (BMI) was measured. The sam
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Answer:

The required interval is (26.23 , 27.37)

Step-by-step explanation:

The mean is = 26.8

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To find the desired interval we will calculate as:

26.8+1.96(\frac{7.42}{\sqrt{654} } )

And 26.8-1.96(\frac{7.42}{\sqrt{654} } )

26.8+0.57 and 26.8-0.57

= 27.37 and 26.23

So, the required interval is (26.23 , 27.37)

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cricket20 [7]

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Step-by-step explanation:

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