The value of a collectible is changing such that dv/dt = 2t/(sqrt(t^2+1)) given in 4/year, and t is the number of years from 2000. The value of the collectible in 2000 was $300.
1. Calculate the value of the object in 1990
a. How do you find the value given a rate equation, and a point?
b. What method did you use?
