Give two examples that show how using parentheses can change the order in wich operations are performed in an expression

The empire state building in new york city is 1454 feet tall a model of a building is 24 inches tall what is the ratio of the height of the model to the height of the actual empire state building

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer