Answer
Domain {1}: 20
Domain {2}: 10
Domain {3}: 5
Work Step by Step
Domain {1}: y = 40($\frac{1}{2}$)$^{1}$ = 40($\frac{1}{2}$) = 20
Domain {2}: y = 40($\frac{1}{2}$)$^{2}$ = 40($\frac{1}{4}$) = 10
Domain {3}: y = 40($\frac{1}{2}$)$^{3}$ = 40($\frac{1}{8}$) = 5
