A certain quantity decays exponentially over time. The initial quantity at t = 0 is 25,000. The quantity decays at a rate of 5%. What is the quantity at t = 3? A. 3.125 B. 21,434.375 C. 28,940.625 D. 3,125,000.000
For this case we have an equation of the form: y = A * (b) ^ t Where, A: initial amount b: decrease rate t: time Substituting values we have: y = 25000 * (0.95) ^ 3 y = 21434.375 Answer: the quantity at t = 3 is: B. 21,434,375
