Answer:
58593
Step-by-step explanation:
The sum to n terms of a geometric sequence is
=
where a is the first term and r the common ratio
r = 15 ÷ 3 = 75 ÷ 15 = 5 and a = 3, hence
=
= =
= 58593
9 pencils cost $7.74 Which equation would help determine the cost of 6 pencils?
1 answer:
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