The scale factor is:

So you divide the corresponding lengths and the ratio you get is the scale factor. Hope it helps!
Answer:
Hey Beebzie
Dang he part of 20m trees? And is Alex a he or she, we'll never know, so I'll just refer to Alex as "it" to not gender appropriate anyone.
So it gets paid 2.25 for one tree. It planted 437 tress.
We take 2.25 x 437 to know the amount of money earned for all trees it planted.
The answer is $983.25, or A. I don't want to gender appropriate the letter "A" either because it could be option 1 or a different letter so I'll just say the answer again to not be sexist, $983.25
To draw a heart, one would be choosing 1 card of 13 possible hearts, and 0 from the remaining 39 non-hearts. With respect to the entire deck, one would be choosing 1 card from 52 total cards. So the probability of drawing a heart is

When Michelle replaces the card, the deck returns the normal, so the probability of drawing any card from a given suit is the same,

. In other words, drawing a spade is independent of having drawn the heart first.
So the probability of drawing a heart, replacing it, then drawing a spade is

.
92 degrees
Triangle= 180 degrees
180-60-28= 92
:)