Answer:
b. 
Step-by-step explanation:
The given geometric series is;

The first term of this series is

The common ratio is

The sum to infinity of this series is

Substitute the given values to obtain;

This implies that;


The answer to the missing value is X = 3
For the first florist you would do $12.50 divided by 4 as there are 2 flower bouquets and 2 vases = $3.125, which represents both b and v
As for the second florist you would do $29.00 divided by 10 as there are 8 flower bouquets and 2 vases. This results to $2.6, this represents the cost of one b and one v.