Observe that as the series progresses, the term decreases by 1/4. To show this, observe the first four terms of the series below.
-200 = (1/4)(-800)
-50 = (1/4)(-200)
-12.5 = (1/4)(-50)
Since we have a common ratio, r, of 1/4, we can use the properties of a geometric series to find the 8th term of the series.
Recall that to find the sum of the nth term of a geometric series, we have

where a is the first term of the series and r is the ratio.
So, for the first eight terms, we have


Therefore, the sum of the 8th series is approximately -1066.65.
Answer: -1066.65
Answer:
c = 10 cm
Step-by-step explanation:
The circumference formula is C = πd. We want to solve this for the diameter, d:
C
d = -------
π
Substituting 31.4 cm for d, we get:
31.4 cm
d = -------------- = 10 cm, when 3.14 is used as an approximation for π/
3.14
Assuming you meant 3 x 10^4 the answer would 30,000
As we see, the table shows 0 equals 4, so 4 is our y axis. we now know our equation is y=_x +4.
lets subtract and find the slope using

7-4 3
1-0 1 the slope is 3. lets substitute.
1(3)+4=7
the slope is 3.