Decimals in the Real World

Transcript

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which cost him five dollars and forty cents a day

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Her stuff also has an electric oven I'm using his

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oven for an hour and a half cost forty five

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cents Chris stops oven is rated at blank kilowatts more

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than his air conditioner Yeah All right Well is there

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anything less fun than dealing with utility bills Don't say

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taking the g e d all right so poor christoph

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is getting slapped around by the power company What else

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is we've all been there Fifteen cents per kilowatt hour

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for electric which were told means that he pays fifteen

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cents to run a one kilowatt appliance for one hour

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Well running the a c cost him five dollars and

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forty cents each day and using the oven cost in

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forty five cents each hour and a half And we

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need to know how the oven is rated compared to

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the e a c Okay well let's roll up our

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sleeves and be prepared to get dirty if we call

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p the power rating of an appliance and see the

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cost of running it for each hours than the product

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P age would be the kilowatt hours used by running

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an appliance rated at p for eight hours Here we've

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got all that very clever people Each kilowatt hour cost

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fifteen cents so we multiply ph by point one five

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to get our cost or see so c equals point

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one Five p h well to compare the ratings of

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christoph to appliances will first need to find the rating

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of the a c that's p a c and the

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rating of the oven he oh separately for the a

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c we're told that five dollars and forty cents or

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five point four equals point one five times p a

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c times twenty four number of hours in a day

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So by dividing to get the rating by itself we

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get p a c equals five point four divided by

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point one five times twenty four for a total of

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one point five kilowatts Then we could do the same

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deal for the oven Point four Five equals point one

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five times p o times one point five the number

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of hours per stop is using it Well this gives

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us a point Four five divided by point one five

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times one point five for a total of two kilowatts

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Phil comparing apples to apples this case kilowatt kilowatts looks

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like the oven is rated at two minus one point

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five floor point Five kilowatts More than the a c

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and that's Our final answer Hopefully this problem helped catch 00:02:47.392 --> [endTime] you up on current events