Tammy wants to get change for 30 cents .the only coins she can get are quarters, nickels, and dimes. how many different ways can she get 30 cents using only these coins

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

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?