consider f(x) = $\displaystyle e^-xsinx$

a)graph from -pi to 3pi/2.. DONE

b)Use the graph of f to approxiamate a positive value of x past which the value of f is less than 0.10.. Don't get this??

c)use calculus to find the POI on the interval[0, pi].. Do I jsut take the 2nd derivative and fidn the zeros??