Lauren is four times as old as Ethan. Lauren is also 15 years older than Ethan. How old are Lauren and Ethan?

Ten times the square of a non-zero number is eqaul to ninety times the number

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?