Rational numbers are any numbers that terminate (the decimal ends somewhere)
The only set that does this is D, since

All other sets have these:

None of these terminate (the decimals goes on forever), so the answer is D
Step-by-step explanation:
my answer is x-7
hmmm.. I hope its correct#
Well i got -19/6 but if you simplify it it would be -3.16667
The answer would be 28 feet, to get area you do length times width, 7 x 4 = 28