9, because there are 3 people with 3 positions not counting helen as she is fixed as the first one. Hope this helps and please vote me as brainliest!
$64 before the tip because 20% multiplied by 80 is 16 which would be 64 after it is taken out of 80
The cone has the smallest volume of the 2 figures. This is because formula for cylinder is <em>b x h</em>, the formula for cone is <em>1/3(b x h)</em> so if they have <em />same height and <em>base area</em> cylinder would have larger volume because for cylinder, formula is one-third of <em>b x h. </em>Hope I helped!! : )