Ivan found the change in a scale factor. His work is shown below. What error did Ivan make?

Mathematics

2 answers:

AlladinOne [14]3 years ago

9 0

Ivan wrote the ratio incorrectly. The ratio should be written as the old length to the new length, so it should be 35/10, which reduces to 7/2. When going from larger to smaller dimensions, the change in the scale factor is a ratio that looks like an improper fraction, with a larger number in the numerator and a smaller number in the denominator.

Tresset [83]3 years ago

5 0

Scale factor is:
factor = (new length) / (old length)
Ivan correctly inserted numbers and correctly divided these two numbers by 5.

There is no error in the shown picture.

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