9514 1404 393
Answer:
 C.  0.36 +0.27 = 0.63
Step-by-step explanation:
3 columns and 6 squares of a hundredths grid is a representation of ...
 0.30 +0.06 = 0.36
2 columns and 7 square is a representation of ...
 0.20 +0.07 = 0.27
The total shaded area is the sum of these:
 0.36 +0.27 = 0.63