Is the divisor is 40 what is the newest three digit david and that will give you a remainder of four

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.