Posted by **Kelly** on Friday, June 10, 2011 at 11:46am.

A 20 ounce bag of popcorn costs $2.80 at the movie theater, if the unit price remains the same, how much would a 35 ounce bag cost ?

Please help me, I'm in math class and Im stuck.

- 8th grade math -
**Ms. Sue**, Friday, June 10, 2011 at 11:49am
Use a proportion. Cross multiply and solve for x.

20/2.80 = 35/x

- 8th grade math -
**Angel**, Friday, June 10, 2011 at 3:11pm
-First find the cost per ounce:

2.80 divided by 20 = .14 per ounce

-Then, multiply by 35 to find the price for 35 ounces:

.14 x 35 = 4.90

-Therefore, a 35 ounce bag of popcorn would be $4.90!

Hope this helped!

- 8th grade math -
**Anonymous**, Wednesday, August 10, 2011 at 11:45pm
n+(-5)

when n=321

- 8th grade math -
**gavaskar**, Sunday, August 21, 2011 at 2:15am
it is 4.90

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