Y = {(2, 6), (3, 1, 4), (1), (5, 6)} Is y a function and why?

Yes, no two ordered pairs in this list has the same second element.
Yes, there is more than one ordered pair in this list.
No, there is a limited number of ordered pairs in this list.
No, the elements of the set of y are not all ordered pairs.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Taking algebra two apex courses and need with these questions

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15