given an interest rate of 4.8 percent per year, what is the value at date t=10 of a perpetual stream of 3200 payments that begins at date t=20?

Industrial engineers who specialize in ergonomics are concerned with designing workspace and devices operated by workers so as to achieve high productivity and comfort. a paper published in this research area reports on a study of preferred height for an experimental keyboard with large forearm-wrist support. a sample of 31 trained typists resulted in an average preferred height of 80.0 cm