Answer
7.203 inches
Work Step by Step
First arc goes 30 inches
Successive swings are 70 percent of the proceeding swing
Find 5th swing length
$a_5 = 30*.7^{5-1}$
$a_5=30*.7^4$
$a_5=30*.2401$
$a_5 = 7.203$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.