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Anna71 [15]
3 years ago
15

The Air conditioner unit in the classroom uses 120 volts. it requires 2000 watts of usage on the average, and it stays on for 8

hours every day. Find out the Amps, Watt hrs/Day, Watts hrs/yr, Kilowatt Hrs/Yr and cost/Yr if the cost of elelctricity per kilowatt is $0.25
Mathematics
1 answer:
nalin [4]3 years ago
5 0

Step-by-step explanation:

P = IV

2000 W = I (120 V)

I = 16.7 A

P = E/t

P = (2000 W × 8 hr) / (1 day)

P = 16,000 W·hr/day

P = 16000 W·hr/day × (365 day / yr)

P = 5,840,000 W·hr/yr

P = 5,840,000 W·hr/yr × (1 kW / 1000 W)

P = 5840 kW·hr/yr

C = 5840 kW·hr/yr × (0.25 $/kW/hr)

C = $1460/yr

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6 0
4 years ago
at the movie theatre admission is $6.30 an adult admission is $9.60. on thursday twice as many adult tickets as child tickets we
Afina-wow [57]

Answer:

number of child tickets sold on saturday is 21

number of adult tickets sold on saturday is 42

Step-by-step explanation:

Let's assume

number of child tickets sold on saturday is x

number of adult tickets sold on saturday is y

On saturday, twice as many adult tickets as child tickets were sold

so, we get

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a total sales of $535.50

we get

now, we can plug y=2x

now, we can solve for x

now, we can find y

so,

number of child tickets sold on saturday is 21

number of adult tickets sold on saturday is 42.........Answer

7 0
3 years ago
Find the mean. Round to the nearest tenth.<br> 4,1,5,5,7,13
Mrrafil [7]
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3 0
3 years ago
The current l, in a circuit varies inversely with the resistance, R. If the resistance is 12 when the current is 3, what is the
ivolga24 [154]

Answer:

6

Step-by-step explanation:

Given I varies inversely with R then the equation relating them is

I =  \frac{k}{R} ← k is the constant of variation

To find k use the condition R = 12 when I = 3

k = IR = 3 × 12 = 36

I = \frac{36}{R} ← equation of variation

When I = 6, then

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abruzzese [7]
Divide 12 by 4
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Just multiply the number of streamers that Megan can hang in a unit of time by 3
→ 6 * 3 = 18

So the answer is 18
6 0
3 years ago
Read 2 more answers
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