Answer:
D. 4
Step-by-step explanation:
2 + 2 = 4
9514 1404 393
Answer:
8
Step-by-step explanation:

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Multiplying by 1/3 is the same as dividing by 3.
Answer: 9.7 seconds
Step-by-step explanation:

Since the base is 3 inches and the height is 4 inches, as well as the area of a triangle being base*height/2, we get 3*4/2=6 in. for each triangle. Since we need 20 pieces for each puzzle, we multiply 6 by 20 to get 120. In addition, since 80 puzzles are needed, with 20 pieces for each puzzle, we have 120 inches for each puzzle and 120*80 = 9600 square inches of wood used