Atree casts a shadow 25 ft long. at the same time, a lamppost 12 ft high casts a shadow 15 ft long. how tall is the tree?

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi