Agallon of gasoline cost $3.09 two years ago. now it costs $1.78. to the nearest percent, what has been the annual rate of decrease in cost?

Draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable andre bakes 9 pans of brownies. he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students