For number 1, the answer would be B, because 10^5 is 100,000 and 10^7 is 10,000,000, and if you divide 10,000,000 by 100,000, your answer is 100.
For number 2, your answer would be A, because 100,000÷10,000 is 10, and 6÷3 is 2. Then, you multiply 10x2 to get 20 as your answer.
Here is the set up:
A = area of rectangular garden = 6/7.
Let l = length = 3/5.
Let w = width
A = lw
6/7 = (3/5)w
Solve for w.
X-y=3
x=3+y
3+y+2y=8
3y=5
y=5/3
x=4 and 2/3
If that is simplified it would be 58