A.........................................
Answer:
#1. 105.5 because of the nine 4 goes to 5
#2. 67,990,000 because of the 4 it doesn't go up
#3. -4.1 because of the 4 the 0 goes to 1
if the number place before the one you are rounding is 5,6,7,8,or 9you go up by one and the rest becomes zeros
if the number place before the one you are rounding is 0,1,2,3,or 4 you stay the same and the rest becomes zeros
We are said that a rectangle has been transformed into the one indicated in Figure 1 according to this rule:

We know that the center of rotation is origin and two rules are applied to rotate a point 90 degrees, namely:
1. Clockwise
In this case, the rule to transform a point is:

This rule was already applied to form the image, so all we need to do is to reverse the answer using this formula, therefore:

2. Counterclockwise
Applying the same previous concept but with the new rules for this case:

By reversing the answer, we have:

F/45 - 2/9 = 2/9....add 2/9 to both sides
f/45 = 2/9 + 2/9
f/45 = 4/9 ...multiply both sides by 45
f = 4/9 * 45
f = 180/9
f = 20 <===