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abruzzese [7]
3 years ago
5

Grace earns $7 for each car she washes. She always saves $25 for her weekly earnings. This week, she wants to have at least $65

in spending money. How many cars must wash?
Mathematics
1 answer:
n200080 [17]3 years ago
7 0
In order to figure out how many cars she must wash, first you should figure out how much money total you need.  This week, she needs $25 for her weekly earnings + $65 for spending money = $90.  Then you divide the total amount of money, $90, by 7.  The answer is 12.8, but because you can't wash 12.8 cars, the answer is 13.
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In this problem it states that one tenth or only 10% is Canada’s population to the United States. Hence with the steps we can identify the population of the United States.
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Therefore there are 320, 000, 000 million living in the United States
Adding one zero. Why the zeroes? It is the result because of the power of 10 in a hundred percent population coming from the Canada’s population. Take note that 100% = 320, 000, 000 million of the USA while 10% of it is Canada so we divide it by 0.1 which is 32, 000, 000 (the power of ten)



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