8th grade math
posted by Kelly .
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.

Use a proportion. Cross multiply and solve for x.
20/2.80 = 35/x 
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! 
n+(5)
when n=321 
it is 4.90