Answer: In 5 years time the population will reach to 56,000.
Step-by-step explanation:
This can be calculated using yearly compound interest formula
Formula for yearly compound interest
CI = P(1+R/100)ⁿ
CI = 56,000
P = 28,000
R = 15%
n= number of years
Now,
56,000 = 28,000 (1+15/100)ⁿ
56,000 = 28,000 (1+.15)ⁿ = 28,000 (1.15)ⁿ
log (56,000/28,000) = n log(1.15)
log 2 = n log (1.15)
n = log 2/log 1.15
n≅ 5
