Q2: The last selection is appropriate.
For a square lawn of area 8x, the length of one side is √(8x). If 2 feet are added to each end, the total length is
.. 2 +√(8x) +2 = √(8x) +4
If this length exceeds the 20 feet of pavers that Aroldo purchased, then there will NOT be enough to complete the project. Hence the inequality you want is
.. √(8x) +4 > 20
Add 8 + 58 = 64. Then divide 64 in half. That makes 32.
32 twice minus 8 equals 58.
The answer is: 32.
Use the rule of logarithms:
log(a)-log(b)=log(a/b)
log(65--log(x)=log(39)=log(65/x)
=> 39=65/x =>
x=65/39=5/3