17. 89.64 nearest one

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

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?

Someone me what is the area of this figure? 18m 18m 8m 16m