Find the area of the circle. Round your answer to the nearest hundredth.
1 answer:
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Answer:
The common difference is -4/3.
Step-by-step explanation:
Recall that the direct formula for an arithmetic sequence is given by:
Where <em>n</em> is the <em>n</em>th term, <em>a</em> is the initial term, and <em>d</em> is the common difference.
We are given that the first term <em>a</em> is 31.
We also know that the 28th term is -5. Hence, <em>x</em>₂₈ = -5. Substitute:
Solve for <em>d</em>. Simplify:
Thus:
Divide both sides by 27. Hence, the common difference is: