Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral. the parabola y = x^2 y=x^2

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

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

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'