Answer:
The first one.
Step-by-step explanation:
The square root of 144=12
12*7/16=r5.25=21/4=rational
[tex]{ \tt{ \sqrt{144} . \frac{7}{16} }} \\ \\ = { \tt{ \sqrt{144} \times \frac{7}{16} }} \\ \\ = { \tt{12 \times \frac{7}{16} }} \\ \\ = { \tt{ \frac{21}{4} }}[/tex]
Answer: 21/4, rational
