It was 210 cm.
The function she used is h(t) = 210 + 33t. This is a linear function, since it is of the form f(x) = mx+b. In a linear function, we have the slope, m, which tells us how much the height increases per year, and the y-intercept, b, which tells us how tall it was when we began measuring. Our m value would be 33 and our b would be 210, so the original height was 210.
S = j
(Not sure if that is what you meant)
This answer gone be c.16-c
So originally, let's say the width of Frank's land was

feet.
The area of his land was therefore

, or

, as his land was square.
The width of his land then increased by 3 feet, and the height decreased by 3 feet.
So the new area of Frank's land is:

So the new land is now
9 square feet smaller, so it is not a fair deal for Frank.
Hope this helps :)