The sum of an infinite geometric series is three times the first term. Find the common ratio of this series.

Step-by-step explanation:

The sum of an  infinite geometric series is expressed according to the formula;

where;

a is the first term of the series

r is the common ratio

If the sum of an infinite geometric series is three times the first term, this is expressed as

Substitute into the formula above to get the common ratio r;

open the parenthesis

subtract 3 from both sides

Hence the common ratio of this series is

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared