True or false decimals

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

52 cm radius = diameter = area = circumference = circumfer