28. Walking home from a friend's house, Haden found that the relationship between his distance
from home and the time he walks is linear. The function w(t)=1.5-0.05e represents this
relationship, where t is the time, in minutes, since Haden left his friend's house and w(t) is his
distance, in miles, from home.
According to this function, by how many miles is Haden's distance from home decreasing for every
additional minute that he walks?
miles