what is 1/2 - 1/2
Im doing modeling subtraction of fractions
The two cereal boxes shown have corresponding edges in a ratio of 2:3. If the smaller box sells for $2.50 and the larger box for $4.00, which is the better buy? Why? What assumption(s) do you have to make when solving the problem? Estimate, then check.
Could someone show me how to solve this? I don't know what formulas to use.
2 answers
hint:
The volumes of the two similar boxes are proportional to the cubes of their corresponding sides.
so the larger box:smaller box = 27:8
so the larger holds over 3 times as much as the smaller.
Now look at the cost.
The volumes of the two similar boxes are proportional to the cubes of their corresponding sides.
so the larger box:smaller box = 27:8
so the larger holds over 3 times as much as the smaller.
Now look at the cost.
2 answers