2y to the 2 power when y = 5

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

What could explain what happened when the time was equal to 120 minutes

One integer is 5 more than another. their product is 104. find the integers