A certain amplifier requires 200 watts when it is being used. How much would is cost to run for 55 minutes, at a cost of .11 per kWh? Round to the nearest cent.

2 cent

Step-by-step explanation:

Given:

A certain amplifier requires 200 watts when it is being used.

Cost of 1 kilowatt per hour = 0.11

Question asked:

How much would it cost to run for 55 minutes ?

Solution:

First of all we will convert 200 watts into kilowatt then we will find cost of 200 watt per hour by using unitary method.

As we know:

1 kilowatt = 1000 watts

1000 watts = 1 kilowatt

1 watts =

200 watts =

Cost of 1 kilowatt per hour = 0.11   (given)

Cost of kilowatt per hour =

Cost of kilowatt in 60 minutes = 0.022

Cost of kilowatt in 1 minute =

Cost of kilowatt in 55 minutes =

Now, to convert it into cent, we will multiply this by 100, hence we get:

Therefore, it would be cost 2 cent to be used 200 watts from amplifier.

the answer is d. (1.2, -4.7) on edgn

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