Evaluate the function at the given value of x. Round your result to three decimal places.
Function ......................................................................... Value
1. f (x) = ex ....................................................................... x = 1.9
2. f (x) = 1.5ex/2 .................................................................. x = 240
3. f (x) = 5000e0.06x ............................................................ x = 6
4. f (x) = 250e0.05x .............................................................. x = 20