If a ball is thrown vertically upward at a speed of 77 feet per second from 5 feet off the ground, how
long will it take to be 20 feet off the ground?
Ot=2, 20
Ot=.5,7
Ot=0.20, 4.61
t=5,77

Step-by-step explanation:

The answer is

Or=.5,7

Cumulative frequency is used to determine the number of observations that lie above (or below) a particular value in a data set. ... The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors.

Step-by-step explanation:

hope this helps you :)