Darren wants to estimate the mean age in a population of trees. He'll sample n
nn trees and build a
90
%
90%90, percent confidence interval for the mean age. He doesn't want the margin of error to exceed
3
33 years. Preliminary data suggests that the standard deviation for the ages of trees in this population is
σ
=
16
σ=16sigma, equals, 16 years.

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x