How can I create a piecewise function for a word problem about kilowatt usage.

Question

The cost for electricity is 7.57 a month plus 8.77 per kilowatt hour for the first 400 kilowatts and a additional charge of 6.574 for usage over 400 kilowatts per month.

1. what is the cost for a month where the usage is 300 kilowatts?

2.What is the cost for 700 for a month?

Write the piecewise function x=kilowatt usage c= cost of usage.

Answer 1

####### yu dont "kreeate" NE-thang...yu evaluate equashun (formula)

kost=7.57$/month +8.77*kilowatts up tu 400 kw-our

for yuze=300 kw-our, kost=8.57+(8.77*300)

=8.57+2,631$

number seem wae 2 big

maebee thats spozed tu be 8.77 sents per kw-our??????

mi lektrik bill hav so many "charjes", broke up in many waes

its NOT possabel tu get even ruf idea wpt falters em yuze.

In quiet month, kost 35-40$, in summer, aer-kon bil up kost tu bout 120$

bil sho thangs like

"transmishun charj"

"availability charj"

& av koers hav taxes & "franshise fees"