Question

Help with this math question please thanks

Answer 1

For this case, what we should do is use the given equation.
 A = P (1 + r) ^ t
 Substituting values we have:
 3900 = 1100 * (1 + 0.04) ^ t
 Clearing t we have:
 (1.04) ^ t = (3900) / (1100)
 log1.04 ((1.04) ^ t) = log1.04 ((3900) / (1100))
 t = log1.04 ((3900) / (1100))
 t = 32.3 years
 Answer:
 the time will be:
 t = 32.3 years