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------------------------------------------------ Their favorite photograph was of Jim Factor falling off a surfboard. The original print was 3.5 inches wide and 5 inches long, but they had it blown up to poster size. If the poster was 6.2 times wider than the photo, how wide was it?

Scale factor is defined as the number or the conversion factor which is used to change the size of a figure without changing its shape. It is used to increase or decrease the size of an object.

The scale factor can be calculated if the dimensions of the original figure and the dimensions of the dilated (increased or decreased) figure are known.

For example, a rectangle has a length of 5 units and a width of 2 units. Now, if we increase the size of this rectangle by a scale factor of 2, the sides will become 10 units and 4 units, respectively.

Hence, we can use the scale factor to get the dimensions of the changed figures.

The scale factor (k) = ratio of the corresponding sides,

We need to find the width of the poster if it is 6.2 times wider than the photo,

So, the original width = 3.5 in

Therefore, the poster size = 3.5 x 6.2 = 21.7 inches.

Hence the poster width is 21.7 inches.

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