A manufacturer buys materials at $10 for 4 and sells them at $20 for 5. How many must it sell in order to make a profit of $600?

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?

Paper plates cost $8 per package and plastic utensils cost $5 per package. your supplier delivers 15 packages for a total cost of $90.