23. natalia decides to collect sea shells. she collects 10 sea shells on the first day. each day after
that, she walks on the beach and picks up 3 new sea shells. the explicit formula that represents
the number of shells in her collection each day is a, = 10 +(n-1)3. what is the 10th term of the
sequence, and what does it represent? show all of your work. explain your answer.