Which venn diagram best represents the relationship among integers, natural numbers, rational numbers, and whole numbers

Chandler was a caretaker at the state zoo. he noticed that the number of animals adopted by the zoo increased at a constant rate every year since 2010. which of the following graphs shows the slowest rate at which the animals in the zoo were adopted?

1. are the triangles similar and if so why? what is the value of x? show your work.

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle