Yes, 13 is the remainder.
See dat pic for full solution.
1. Factor the expression 

2. Since
is placed in the denominator of the given expression, then 
3. Now the expression can be simplified:

Step-by-step explanation:
In simplest radical form
= √-3
= -3^(1/2)
or
= √-3
= √3i
i is imaginary number, you can write it if you find a negative number in a square root
Answer:{}
B. Median
Their is no real explanation.
Answer:
7 x 3/9 = 21/9 = 2.33
11 x 2/3 = 22/3 = 7.33
4/9 x 3/8 = 4/9 x 3 / 8 = 4/3/8 = 1/6
7/9 x 4/5 = 7
/9 ⋅ 4/5 = 28/9/5 = 28/45
1 1/15 x 1/3 = 0.35