Answer:

Step-by-step explanation:
A root can be converted to a power by taking the base of the root (in this case 4) and making it 1 over that number, so in this case 
If it were the fifth root you would make it to the 1 over 5 power.
Answer:
42 cubic cm
Step-by-step explanation:
This answer should be the third one
Answer:
25 students
Step-by-step explanation:
To solve this problem, use cross multiplication:

3x = 75
x = 25
There are a total of 25 students in the class.