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2 years ago

9

there are 20 children at a library 6 of the children have an average age of five years the remaining children have an average ag

e of 8 years what is the average age of all the children at the library

1 answer:

GrogVix [38]2 years ago

5 0

Remaining children = 20-6=14
So 14 children have age of 8 years old.

Average age = (6*5+14*8)/20 ≈ 7.1 ≈ 7 years old

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Answer:

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Step-by-step explanation:

✍️What we are basically asked to solve here is to find the distance between C and D.

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Plug in the values

$tan(40) = \frac{BC}{42}$

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$\theta = 30$

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Thus:

$tan(\theta) = \frac{opposite}{adjacent}$

Plug in the values

$tan(30) = \frac{BD}{42}$

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BD = 24.25 m

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7 0

2 years ago

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Lana71 [14]

Answer:

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2 years ago

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Blababa [14]

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dedylja [7]

40% means 0.4 .

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3 0

2 years ago

Hope someone can help me with this

AVprozaik [17]

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3 years ago