If 1 ounce of silver costs $5.50, how much money is needed to buy 2 1/2 pounds of silver? 16 oz = 1 pound

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project