Question

Karim sent a chain email to 10 of his friends. The number of people who got the email increases by a factor of 1.41.41, point, 4 every week. Which expression gives the number of people who got the email after 666 weeks?

Answer 1

A). 10×1.4^6

Explanation:

I did this question on Khan Academy.

Answer 2

After 6 weeks the number of people who had the email will be
`(1.4)^(5) * 10`.

Explanation:

Initially, there were 10 people who had the email.

Now, every week, the number of people who got the email increases by a factor of 1.4.

Therefore, after the first week, the number of people who had the email was 1.4 × 10.

After the second week, the number of people who had the email was (1.4)² × 10, and so on.

Hence, after 6 weeks the number of people who had the email will be
`(1.4)^((6 - 1)) * 10 = (1.4)^(5) * 10`. (Answer)