What is the sum of the geometric series

Hence, the sum of the geometric series is:

                                      259

Step-by-step explanation:

We are given a geometric series as:

i.e. we are asked to fnd the sum of first four terms of the geometric series with first term as 1

Since, the series is:

Also, the common ratio of the series is: r=6

Since, each of the term of the series is 6 times it's preceding term.

Also we know that sum of a finite geometric series with n-terms and common ratio r is calculated by the formula:

Here we have: a=1 and r=6 and n=4

Hence,

                        Hence, the sum of the series is:

                                     259

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.