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Mathematics 18 Online
OpenStudy (anonymous):

help please

OpenStudy (anonymous):

The number of bucket of paint n needed to paint a fence varies directions with the total area a of the fence and inversely with amount of paint p in a bucket. It takes three 1-gallon buckets of paint to paint 72 square feet of fence. How many 1-gallon buckets will be needed to paint 90 square feet of fence.

OpenStudy (anonymous):

First, how many 1-gallon buckets are needed for 72 sq ft?

OpenStudy (anonymous):

Okay, great!

OpenStudy (anonymous):

Take your 3 gallons and divide them into 72.

OpenStudy (anonymous):

24

OpenStudy (anonymous):

Great! Now divide 90 by 24

OpenStudy (anonymous):

3.75

OpenStudy (anonymous):

Cool, so how many 1-gallon buckets do you need to paint the 90 sq ft of fence?

OpenStudy (anonymous):

3.75 gallons

OpenStudy (anonymous):

Yep! However, the question is asking how many buckets you need. This is the tricky part. You need to round up to 4!

OpenStudy (anonymous):

ok thanks

OpenStudy (anonymous):

No prob, glad I could help!

OpenStudy (anonymous):

can you help me with 2 more

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