Question

Which is an equivalent form of the expression 1800(1.2)–t?
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Answer 1

Assuming the expression is 1800(1.2)^(−t), an equivalent form is

1800/(1.2^t)

and since 1.2 = 6/5, also

1800(5/6)^t.

(So choose 1800(5/6)^t or 1800/(1.2^t).)