Enter the expression 2gδym√, where δ is the uppercase greek letter delta?

The problem ask to enter expression that is given in your problems where as the triangle symbol is the Greek letter of Delta and the answer to your problem is the delta Y and m is the change in potential Energy of an Object . I hope you are satisfied with my answer and feel free to ask for more 

Ithink the answer will be d yes

How many people are we starting with? i will answer it's just i need to divide 8 by the total amount of people to get how many tables