Smita is experimenting with how a paper airplane's shape affects the distance it will fly. Which action is the result of her logical reasoning? A. She follows her procedure carefully. B. She decides to use the same type of paper for each airplane. C. She decides to perform the experiment outside on a windy day. D. She records only the data that support her favorite hypothesis.

She decides to use the same type of paper for each airplane

Step-by-step explanation:

aₙ = 63 * (1/3)ⁿ

Step-by-step explanation:

In the sequence 63, 21, 7,... each term is divided by 3 to get the next term

Therefore, this is a geometric series where r (the common ratio) is 1/3.

The first term in the series is 63, so that is our a₀.

The general form for a geometric series is a₀ * rⁿ

Therefore, the formula for aₙ is

aₙ = 63 * (1/3)ⁿ

I hope this helps!