Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.a = 9, d = 0.3
A. an = 9n + 0.3; a20 = 180.3
B. an = 9n - 8.7; a20 = 171.3
C. an = 0.3n + 8.7; a20 = 14.7
D. an = 0.3n + 9; a20 = 15
Answer: C
Mathematics
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??
?x? 12345 ?P?(?x)
?
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