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Mathematics 7 Online
OpenStudy (anonymous):

Hellllllpppp? :) A prairie fire is spreading at a rate of 25% per day. Right now it has burned 120 square acres. How many acres will it have burned in one week (seven days)? a) approximately 572 square acres b) approximately 434 square acres c) approximately 295 square acres d) approximately 188 square acres

OpenStudy (anonymous):

HI :DD

OpenStudy (jziggy):

(Initial Value)(New Percent)^(Number of repetitions)

OpenStudy (anonymous):

So 120*0.25^7 ?

OpenStudy (jziggy):

Well, your new percent will be your old percent (100) + the change (25)

OpenStudy (jziggy):

So, 1.25

OpenStudy (anonymous):

Oooh okay so that would be 120*1.25^7 ? :)

OpenStudy (jziggy):

Yes it would, now all you need to do is simplify :D

OpenStudy (anonymous):

So then the answer would be A, correct? Thanks for your help!! :')

OpenStudy (jziggy):

Indeed it would be, and no problem.

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