Question

Julia collects shells from the beach while on vacation with her family. Suppose each day, Julia collects 3 times as many shells as she did the day before. If Julia collects 1 shell on the first day, how many shells will she collect on the fifth day of her vacation?

1. 3
2. 9
3. 27
4. 81

Answer 1

if she collects 1 on the first day, and she collects 3 times that on the second day, she collects 1x3=3 shells the second day. The third day, she collects 3 times that amount, so 3x3=9 shells. The fourth day, she collects 3 times that amount, 3x9=27, and the fifth day, 27x3=81 shells