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To find the area of Casey's bedroom, we need to count the number of shaded squares and add them up.
2 rows of 3 squares each is 2 x 3 = 6 squares
1 row of 8 squares is simply 8 squares
5 rows of 10 squares each is 5 x 10 = 50 squares
Adding them together, we get:
6 + 8 + 50 = 64
Therefore, the area of Casey's bedroom is 64 square units. The correct answer is (C) 64.