The figures are increasing by half each week. To calculate the figure for the 11th week you could use this sum: 20×1.5^11 20 is the starting figure. 1.5 is the multiplying factor to get the figure for the next week and the 11 is the number of weeks.
If the party has 35 guests and each guest is expected to “drop in” there would be around “17.5” guests. I believe that they should order just Fried chicken. I don’t see the answer choices so I will list different possibilities.
