Seudónimo Seudónimo 31-01-2017 Mathematics contestada Joe's dad was making a patio. He first spread a layer of sand 2.25 inches thick. Then he poured a layer of concrete 3.75 inches thick. What is the total thickness of the sand and concrete combined? A. 1.50 in. B. 3.75 in. C. 5.00 in. D. 6.00 in.