The ratio that is not equivalent is B. 7:15
The reason why it's not equivalent because for the other ratios:
1:5 could be turned into 2:10 by multiplying 1 and 5 by 2.
4:20 could turn into 2:10 by dividing both numbers by 2.
And 8:40 could be divided by 4 to get 2:10.
But you can't do anything to 7:15 to make it 2:10.
This is probably in the context of a discussion of significant figures and accuracy.
When we record a measurement of 4.15 cm with two significant figures, that means we believe the exact value is in the range from 4.145 cm to 41.155 cm
Similarly 7.34 really means between 7.335 and 7.345 cm.
The minimum area rectangle is

The maximum area rectangle is

Choice A
Final Answer: 
Steps/Reasons/Explanation:
Question: Solve for
.
.
= ?
<u>Step 1</u>: Divide both sides by
.

<u>Step 2</u>: Simplify
to
.

~I hope I helped you :)~
Pooooooooooooooooooooooooooooooooooooooopy :p