Answer:
a) 17
b) 21st term
Step-by-step explanation:
a) 20 - 3 = 17
b) 20 - 21 = -1
Based in your question where as the oil is pumped continuously from the well at a rate proportional to the amount of the oil left in the well. so the answer of the following questions are:
A.1 is to 200,000
B.5 years
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
<u>Algebra I</u>
- Slope Formula:

Step-by-step explanation:
<u>Step 1: Define</u>
<em>Find points from the graph.</em>
Point (-2, 0)
Point (0, -2)
<u>Step 2: Find slope </u><em><u>m</u></em>
- Substitute:

- Subtract/Add:

- Divide:

And we have our final answer!
Answer:
349866
Step-by-step explanation:
L = a + (n - 1) * d
1671 = 3 + (n - 1) * 4
1668 = (n - 1) * 4
417 = n - 1
n = 418
Sn = n/2 * (a + L)
Sn = 418/2 * (3 + 1671)
Sn = 349866