 # One reason for the increase in the life span over the years has been the advances in medical technology. lwfrgin 2021-09-30 Answered
One reason for the increase in the life span over the years has been the advances in medical technology. The average life span for American women from Email-trough 2007 is given by $W\left(t\right)=49.9+17.1\mathrm{ln}t\left(1\le t\right)$ where W(t) is measured in years and t is measured in 20-year intervals, with t=1 corresponding to the beginning of 1907.
a. Show that W is increasing on (1, 6).
b. What can you say about the concavity of the graph of W on the interval (1, 6)?
You can still ask an expert for help

• Questions are typically answered in as fast as 30 minutes

Solve your problem for the price of one coffee

• Math expert for every subject
• Pay only if we can solve it liingliing8
a) Calculating W'(t) we conclude that W is increasing on (1,6).
b) Calculating W"(t) we conclude that W is concave downward on (1,6).
w(t) is concave downwards in (1,6)