a.
To solve this portion of the question, we need to add 30 to the length and the width. The reason behind adding 30 is that 15 x 2 = 30. The fence is not on just one side of pool but on both sides meaning that we will have to double the distance between. With that we are left with:
30 + 22 ft by 30 + 23 ft
which simplifies to
52 ft by 53 ft.
To find how many feet of fencing, we will need to calculate the perimeter of the larger box which is essentially the fencing itself. The formula for perimeter is 2(length + width). We can plug in the dimensions we just solved for into this formula.
2(length + width)
= 2( 52 + 53)
= 2(105)
= 210
Final Answer: 52 ft by 53 ft; 210 ft