Question

In 1996, only 193 people owned cellphones in metropolis. Each year, cell phone use has continuously grown by 58%. How many cellphone users were there in 2008? (Show your work)

Answer 1

A = 193e^(0.58*12)
A = 203351 people

Answer 2

For this case we have an equation of the form:

`y = A * (b) ^ x`
Where,
A: initial amount
b: growth rate
x: time in years
Substituting values we have:

`y = 193 * (1.58) ^ x`
For the year 2008 we have:

`x = 2008 - 1996 x = 12 y = 193 * (1.58) ^ {12} y = 46713.49403`
Round to the whole whole integer:

`y = 46714`
Answer:
there were 46714 cellphone users in 2008