By adding/ subtraction systems
1369. If this is what you are trying to find, hope this helps.
<u><em>16.1 is the final answer. </em></u>
<em>Product- it's going to be multiply by the numbers only.</em>

<em>You can also round up to the nearest tenths is 16.0</em>
<em>Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie</em>
Arc length (L) = 83.7758 ft