45000 dollars with a rate of 14% to 36 months

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Arectangular courtyard is 12 feet long and 8 feet wide. a tile is 2 feet long and 2 feet wide. how many tiles are needed to cover the courtyard?