Please help! What is the perimeter of this irregular polygon?(Round your answer to the nearest tenth.) Answer + explanation please! <3

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Answer for 10 points show work you guys in advanced < 3

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle