1/2x + 13 = 9
Hurry I need help I’m to lazy

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Brent wants to know what is 5 x 1/2

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?