I honestly have no idea. I hate algebra.
Answer:
The question says area of a square = 9 cm squared.
And they said if the sides are doubled in length what is the new length
so new length = 9 cm^2 × 9 cm^2
which should give you 81cm^2
therefore your answer should be = C
there are 19 unfavorable spots in 21 for Daeshon,
thus Pr = 19/21 [ B ] <----
