Question

Please Help! (10 POINTS)

Zelie planned for a square pool to have a side length of 28 ft but found that it needs to be 14 ft long to fit in her backyard. She found the change of scale below.

Which is Zelie’s error?

Zelie should have divided both numbers by 14.
Zelie should have written the ratio as 28/7.
Zelie should have written the ratio as 14/8.
Zelie should have subtracted 14 from both numbers.

Answer 1

the first one

Explanation:

Answer 2

The initial measure is:
m1 = 28 ft
The real measure must be:
m2 = 14 ft
The correct procedure to determine the scale factor is:

`k = m1 / m2 k = 28/14`
Dividing both numbers between 14 we have:

`k = (28/14) / (14/14)`
Rewriting:

`k = 2/1 k = 2`
Answer:
Zelie should have divided both numbers by 14.