Answer:

Step-by-step explanation:
Given the expressions all that is required is to expand them (using the distributive property) to see which answers they match up to:
For a:
For b:
For c calculate the square of a sum: 
(add like terms) c: 
For d: 

While it does sounds redundant, it could be a "part to whole" ratio
1.625 rounded to the nearest hundredth is 1.63