how many kilograms of pure water is to be added to 100 kilograms of a 30% saline solution to make it a 10% saline solution

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?

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function