Find the number of subsets of the set {1, 2, 3, ..., 9}

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4