Using Excel formulas
=LARGE(A1:A20, 1)/COUNT (A1:A20)
Count (Ai:An) Function that allows to count the total number of values in a cells range between Ai and An that contain only numbers.
Large (Ai:An, k) Function that allows to find the value of the largest number in a cells range between Ai and An, the number k determine the k-th largest value
When the ball hits the ground, the height is 0.
0 = 100 - 16t²
0 = (10 - 4t)(10 + 4t)
0 = 10 - 4t or 0 = 10 + 4t
4t = 10 or -4t = 10
t =
or t = 
Time cannot be negative (unless you have a time machine) so disregard 
Answer: t =
= 2.5 seconds
If the value of x-y is negative, and x and y are both positive.
x and y are positive numbers. To get negative number while subtracting , the value of x should be less than the value of y.
For example, 5 - 9 = -4
x is 5 and y is 9 both are positive. 5 - 9 is -4 that is negative.
5 is less than 9
From this we can conclude that the value of x is less than the value of y.
By estimating. 5x700 is 3500. i multiplied the first digits in the equation.
The correct answer would be Side Angle Side