Mary found 75 seashells on the beach she gave Sarah some of her seashells. she has 13 seashells left. how many seashells did she give to Sarah.

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?

Factor the following expression completely 6x^11-24x^7