TThe idea of real problem-solving is that you do NOT have a template or an example to mimic. You need to develop a strategy for solving these problems, with the idea of building your problem-solving skills. Since these are level 2 problem, we will, however, give you hints here:
Problem 37: Draw a Venn diagram.
Problem 38: Draw a Venn diagram.
Problem 39: HEIGHT OF STANDARD OIL BUILDING + HEIGHT OF SEARS BUILDING = 2590
Problem 40: AREA OF NEW YORK + AREA OF CALIFORNIA = 204,192
Problem 41: 
Problem 42: Draw a Venn diagram.
Problem 43: Draw a Venn diagram.
Problem 44: See Example 3.
Problem 45: See Example 3.
Problem 46: See Example 2.
Problem 47: See Example 2.
Problem 48: See Example 3.
Note: Homework Hints are given only for the levels 1 and 2 problems.