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The height of a stack of DVD cases is in a proportional relationship to the number of cases in the stack. A stack of 7 cases and its height are shown. Find the constant of proportionality. Then use the constant of proportionality to find the height of a stack of 12 cases.

The height of a stack of DVD cases is in a proportional relationship to the number of cases in the stack A stack of 7 cases and its height are shown Find the co class=

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ZuyIis

Answer:

For a stack of 12 DVD cases, it will be 132mm in height

Step-by-step explanation:

There are 7 cases stacked on top of each other and the total height is 77mm.

Since you must find the height of each individual DVD case you have to divide the height (77mm) by the number of DVD cases (7):

77 / 7 = 11        or       77 ÷ 7 = 11

Then, it asks to find the height of a stack of 12 cases, so take the 11, the height of each DVD case, and multiply it by 12:

11 × 12 = 132

So, the height of 12 DVD cases stacked on top of each other is 132mm.