Lydia started collecting seashells when she was five years old. At age seven, Lydia had 12(10) ? seashells. At age nine,
Lydia had 24(10) ? seashells. At age eleven, Lydia had
48(10)? seashells. Lydia wants to collect 75(10) 3 seashells.
Lydia continues to collect seashells at the same rate.
How old will Lydia be when she has 75(10): seashells?
Show all your mathematical thinking. Lydia will be 13 when
she has 75(10)