Step-by-step explanation:
an = a1 + 4×[2^(n -1) - 1]
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The rule is add 1.05 because it's 1.8 first then it's 2.85 so you add 1.05 to 1.8 and you will get 2.85. Same with the other numbers.
Set the proportion 40% = x
100% 50 then cross multiply to solve it.
Answer:
-1/30
Step-by-step explanation: