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Answer:
B. 8.625 ft²
Explanation:
The total area is the sum of the areas of the two rectangular sections and the area of the triangular section. The area formulas are ...
A = LW . . . rectangle
A = 1/2bh . . . triangle
Here, the dimensions are such that we can simplify the problem a bit
total area = (1.5)(2.5) +1/2(1.5)(1.5) + (1.5)(2.5)
= (1.5)(2.5 + 1.5/2 + 2.5)
= (1.5)(5.75) = 8.625 . . . . . ft²
The total surface area of the desk is 8.625 square feet.