David earns 20% commission as a salesperson. He sold a hammock that cost $100. ​How much commission did David earn? plz help

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

What are the triple angle formulas? is it related to double angle identities?

How much is $1200 worth at the end of1 year,if the interest rate is 5.5% is compounded quarterly.