The table represents a linear function

What situation is an example of an observational study

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?