Answer:
a and c
Step-by-step explanation:
Square root is the number that when multiplied when itself give the number you are looking for if that makes any sense.
8 is the square root of 64 because 8x8 = 64
I pretty sure that the answer would be 6 50/117 but if you get a fraction calculator app it can help more.
Slope is for a average rate and unit rate is what you get for just one thing