Answer:
6 5/12
Step by step: Subtraction 15 5/6 - 3 3/4 = 12 1/2 - 5 2/3 = 6 5/12
51 inches (or 4 feet 2 inches)
Step-by-step explanation:
if she was 44 inches at the start of second grade, grew 4 inches through second, then grew 3 more inches through third grade, she would be 51 inches (Or 4 feet 2 inches)