In 2009, the world population reached 7 billon. If we assumed a growth rate of 1.5%, when will the population reach 10 billon?

Question

application that are used to solve this problem.

Answer 1

A = a₀(r)^t

A = 7(1.015)^t

10 = 7(1.015)^t

10/7 = 1.015^t

1.42857 ≈ 1.015^t

ln 1.42857 ≈ t ln 1.015

0.035667 ≈ 0.014886t

2.396 ≈ t