What is the amount of change of 90-81

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

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?

Find the area of a parallelogram with base 15 yards and height 21 2/3