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gizmo_the_mogwai [7]
3 years ago
12

electricity has two different rates off peak is 10pm to 6am and charged at 8p per hour. peak is 6am to 10pm and is charged at 12

p per hour. alison turns uses electricity from 8pm to 11:30 pm. what is the dost of her electricity for that period
Mathematics
2 answers:
faltersainse [42]3 years ago
8 0

Answer:

32p

Step-by-step explanation:

Times between 8pm and 11.30 are:

8pm,9pm,10pm,11pm,11.30pm

Costs for associated times:

8pm: 12p

9pm: 12p

10pm : 12p

11pm: 8p

11.30 pm: 4p

Total/sum = 32p

nadezda [96]3 years ago
8 0

Answer:

32P

Step-by-step explanation:

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Answer:

See solutions below

Step-by-step explanation:

From the given diagram;

AC = opposite

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Angle of elevation = 70 degrees

Using SOH CAH TOA

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Sin 70 = AC/7

AC = 7sin70

AC = 7(0.9397)

AC = 6.58

Similarly

tan 70 = AC/BC

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BC = 6.58/tan70

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tan m<A = BC/AC

tanm<A = 2.39/6.58

tan m<A = 0.3632

m<A = 19.96degrees

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2 years ago
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Answer:

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Step-by-step explanation:

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Hope this helps

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