21) The first buses to Y and Z leave a bus station at 7 am. Buses to Y leave every 25 minutes.
Buses to Z leave every 20 minutes.
When will buses to Y and Z next leave at the same time?

The depreciation per unit for a company

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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?