Which expression represents the cost of the mulch based on the radius of the circle

Its a right angled triangle not a right triangle

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.

It might be "an artistic taste"  hope i !