81,149, 274.... adding three numbers from the last would help you
like if you take 7 = 4 + 2 +1
or 13 = 7 + 4 +2
similarly 44+24+13 = 81
81+44 +24 = 149
149 + 81 +44 = 274
hope you get it!
The greatest number of adults who can chaperone
35-20 = 15
The 90% confidence interval is (70 - 4, 70 + 4). The margin of error is 4%.
Answer:
The explanation is on top x=10