During a long road trip, you drive 420 miles on a 12-gallon tank of gas. what is your gas mileage (in miles per gallon)?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Witch represents the inverse of the function f(x)=1/4x-12

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.