8/32 I think but double check bc I don't know if its my correct calculations.
Answer:
Step-by-step explanation:

the error was in not take the root of the number correctly
the student assumes that the root of 144 was equal to 72
Answer:

Step-by-step explanation:
Cosine is the ratio of the side adjacent to the angle and the right triangle hypotenuse.
B =
= 
1/3 (or .33 or 33%)
cube has 6 sides with numbers 1-6 on each
probability of rolling a 3 = 1/6
probability of rolling a 4 = 1/6
1/6 + 1/6 = 2/6 = 1/3