how to incorporate the mathematical practice standards and constructivism into an elementary classroom

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Urgent? will give brainliest to the first correct answer what is the area of the figure?

How would you describe the difference between the graphs of f(x) = 2x2 and g(x) = -2x2?