2. Opportunity Cost and Ira David and Katie are roommates. They spend most of their time studying for economics classes,
but they leave some time for their 2nd and 3rd favorite activities, coding video games and making
friendship bracelets. It takes David an hour to write 50 lines of code and one hour to make 20
friendship bracelets. It takes Katie an hour to write 60 lines of code and one hour to make 30
friendship bracelets. They each work 3 hours per week.
What is the opportunity cost

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?