cierto bosque cubre un área de 4500km2 supongamos que cada año esta área disminuye un 8.25% qué área cubre este bosque al final de 15 años

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

Plz hurry evaluate the expression a+b where a=8 and b=19