X to the power of two thirds <span />
Your answer would be option D, as irrational numbers cannot be expressed as simple fractions and cannot include repeated numbers like option A, so option D is the only number that is irrational and can be added to 1/4 to remain irrational.
I hope this helps!
Answer:
the first one
Step-by-step explanation:
6 1/4 = 25/4
(25/4)*3 = 75/4
(72+3)/4 = 72/4 + 3/4 = 18 3/4 miles per hour