Hello!

is automatically rational because it can be expressed as a fraction. Another way to find out if it's rational is to convert it to a decimal, then see if the decimal is terminating or repeating.

This decimal is terminating.
:)
Answer:

Step-by-step explanation:
a^2+b^2=c^2
5^2+b^2=16^2
25+b^2=256
b^2=231
b=
Yes but I can’t really see it
Answer:
54.7599
Step-by-step explanation:
D is the one that is decreasing