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Ber [7]
3 years ago
15

Can anyone help me with this please and maybe explain it?.. I need working please

Mathematics
2 answers:
m_a_m_a [10]3 years ago
4 0

Electricity used in 40 minutes = 800 watts

So, electricity used in 1 minute

= 800watts/40

= 20 watts

Electricity used in 3 hours

= electricity used in 180 minutes

= electricity used in 1 minute × 180

= 20 watts × 180

= 3600 watts

Tanzania [10]3 years ago
3 0

Answer:

it uses 3,600 watts of electricity in 3 hours

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Answer: 2160°

Step-by-step explanation:

The sum of angles in a polygon is represented by the formula:

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In this case, the complex polygon has 14 sides (n = 14)

So, (14 - 2) x 180°

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Thus, the sum of interior angles of a convex 14-gon is 2160°

3 0
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Step-by-step explanation:

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Subtract 3 from 17.

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Step-by-step explanation:

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