Exercise 38 Page 287

Practice makes perfect

a We are given a table that shows the total number of visitors to a website over a period of time. We see that the t-values have a common difference of 1, and that the number of visitors have a common ratio of 1.1.

The table represents an exponential growth function, since each time the number of visitors is multiplied by a number greater than 1.

b We know the number of visitors 45 days after a website is online. To find the number of visitors after 47 days, we multiply 14 641 by ( 1.1)^2 because 47-45= 2. Let's multiply.

14 641 * ( 1.1)^2

CalcPow

Calculate power

14 641 * (1.21)

Multiply

17 715.61

RoundInt

Round to nearest integer

17 716

The number of visitors after 47 days is about $17 716.