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svp [43]
3 years ago
9

The librarian was checking the thicknesses of several books and found that the average thickness of a book was 1.8 centimeters.

She found this by averaging the thicknesses of five different books. Four of the thicknesses were 1.4 cm, 1.9 cm, 2.1 cm, and 2.4 cm. What was the thickness of the fifth book that she measured?
Mathematics
1 answer:
kvasek [131]3 years ago
4 0

Answer:

1.2 cm

Step-by-step explanation:

1.8 * 5 = 9

9 - (1.4 + 1.9 + 2.1 + 2.4) = 1.2

1.2 + 1.4 + 1.9 + 2.1 + 2.4 = 9

9/5 = 1.8

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What is the distance between 3, 5 and -4, 1
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Answer:

Distance = 8.06

Step-by-step explanation:

We have to use the distance formula d=\sqrt{(x_{2}-x_{1})^{2} +(y_{2}-y_{1})^{2}  }.

(x_{1},y_{1}) = coordinates of the first point

(x_{2},y_{2} ) = coordinates of the second point

To solve, plug the appropriate values into the formula.

d=\sqrt{(-4-3)^{2} +(1-5)^{2} } = \sqrt{65} = 8.062257748

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Answer:

None of the above. 16 3/2 simplified is

Mixed number: 17 1/2

Improper fraction: 35/2

Step-by-step explanation:

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3 years ago
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3 years ago
If the scale of the map is 1 inch = 125 miles, two points that are 3.75 inches apart will actually be approximately how many mil
lys-0071 [83]

Answer:

469 miles

Step-by-step explanation:

1 in = 125 miles

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3.75 x 125 = 468.75 miles

468.75 rounds up to 469 miles

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