Trying to understand where each thing is at on the geometric series/sequence. where would i find a1, r, and n on these and what would be the sum of the last one? is there any calculator i can look up to me with this you!

What is the measure of angle afe? 79 81 91 99

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 liters, including 3,000 liters of work in process at the beginning of the period. the ending work in process was 5,000 liters. how many liters were started and completed during the period?