41 The weight of a puppy is currently 5 pounds The puppy gro

41 The weight of a puppy is currently 5 pounds. The puppy grows at a rate of 18% each month. After how many months will the puppy weigh 15 pounds? Round your answer to the nearest two decimal places.

Solution

w(t) =w₀(1+r)^t

HerHere w(t)=15, w₀=5, r=0.18

15=5(1+.18)^t

3=1.18^t

log 3= t log 1.18

t=6.64months