I get 1.1067 (rounded) for the first and 28.618 (rounded) for the second.
The exact key punches I used were:
1.5 [square root] [square root]
The square root key looks like a check mark and is just above the "%" key on the far right (even in standard view).
and
1.5 [cube root]
The cube root key is between the x
3 and "1" keys in the middle of the scientific view key pad.