Answer:
Option D
Step-by-step explanation:
Whenever we take a square root of a number the ± sign is with it like here in the question

And then x = ±4.47 which means x has two values one is +4.47 and the other is -4.47 so Option D is our answer.
Answer:
10cm
Step-by-step explanation:
68-48=20
20/2=10
Answer:
point, line, plane
Step-by-step explanation:
none of these can be defined exactly
Answer:
every fraction is a rational number but a rational number need not be a fraction