Answer:
0.625
Explanation:
As the excerpt says that the yard grew 16 centimeters in 10 days at a constant rate, you can use a rule of three to determine how many days it took to grow 1 cm:
10 days → 16 cm
x ← 1 cm
x=(1 cm*10 days)/16 cm
x= 0.625 days
According to this, the answer is that it took 0.625 days for the grass to grow 1 centimeter.