At a conference, the organizer determined that 32% of the attendees were between the ages of 18 and 29. Since there were 216 attendees in this age range, there were
total attendees at the conference.

the answer is 675

Step-by-step explanation:

for me other answers were wrong

oof

step-by-step explanation:

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.