Answer:
10.7
Step-by-step explanation:
Answer: 35.52
Step-by-step explanation:
Answer:
11.33 degrees
Step-by-step explanation:
-16 because you need to subtract -4 from -12
So, let's make these two values improper fractions so they're easier to work with. 
So, to get the rate he grew in those months we have:
And to get the rate he grew in one month we have to divide both our numerator and our denominator by 21 to get:
aka he grew 1.24 inches in a month.