Any terminating decimal number is rational.
A rational number is a number that can be written as a fraction of integers.
0.444 = 444/1000 = 222/500 = 111/250
0.444 is the same as 111/250, a fraction of integers, so 0.444 is rational.
Answer: 2 1/2 1 1/6 2 2/5
Step-by-step explanation:
First, you solve the square root:

Knowing that the square root of a negative number doesn't exist:


is your answer.
Hope it helped,
Happy homework/ study/ exam!
I am not sure about this but here goes nothing: d=2.5t+2.2 is very familiar to y=mx+b y=d m=2.5 x=t b=2.2 to find a new quasion we substitute d and t into place wich equals 1=2.5(0)+b simplification and you get b=1 so your answer is d=2.5t+1