<u>Understanding:</u>
The sum of a geometric series is,
, with a being the start point and r is the common ratio. We can also use the following formula to make life easier
, a is your start point, r is the common ratio, and n is the number of terms, which in our case is S7.
<u>Solution:</u>
Our start point is 1,
,
The common ratio is 5,
,
And finally, the number of terms is 7,
.

The answer is [A] 19531.
Answer:
False i think
Step-by-step explanation:
y=23x+143 hope this helps
Answer:
Be an GH
Step-by-step explanation:
Answer: 4 and 7.5 you multiply them
Step-by-step explanation: