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Varvara68 [4.7K]
3 years ago
13

The scale of a map says that 3 cm represents 8 km.

Mathematics
1 answer:
nlexa [21]3 years ago
7 0

Answer:

Step-by-step explanation:

Problem 1

<em>Set Up the Proportion</em>

3 cm / 8 km = x / 20 km                Cross multiply

3*20 = 8x                                        Combine the left

60 = 8x                                           Divide by 8

60/8 = x

7 4/8  = x

7 1/2 km = x

7.5 km  = x

Problem 2

3 cm / 8km = 12 cm / x                  Cross multiply

3x = 12 * 8                                      Combine the right

3x = 96                                          Divide by 3

3x/3 = 96/3

x = 32 km

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erica [24]

The value of x that is the length from the edge of the screen to the end of the wall is equal 3. This is derived from an equation which serves as a function of the Area. See the solution below.

<h3>

What is the calculation for the solution above?
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Recall that the area of the entire wall is 40m².

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2 years ago
Number of Text Messages a Day A random sample of n = 755 US cell phone users age 18 and older in May 2011 found that the average
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Answer:

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b) at 95% confidence interval

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