What is the surface area of a cylindrical tub that is 20 cm in diameter and 30 cm tall? algebra

What is the vertex form of f(x) = x2 + 6x + 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 .

Hi, can anyone show me how to do this problem? 100 points for this. in advance