An object attached to the end of a spring is oscillating up and down. The displacement of the object, y, in centimeters, is a function of the time, t, in seconds and is given by y=2.4cos(t)-.3y = 2.4 cos (t) − .3 . Find the first time it reaches a) .9 centimeters and b) 2.1 centimeters. 2. A rodent population in a particular region varies with the number of predators that inhabit the region. At any time, you could predict the rodent population, r(t), using the function LaTeX: r(t) = 2500 - 1500sin(t)r ( t ) = 2500 − 1500 s i n ( t ). Starting at t = 0, when is the first time that the rodent population will reach 3250?