√16•25

To simplify the expression √16•25, we can first simplify each square root individually.

√16 = 4 because the square root of 16 is a whole number (4) that, when squared, equals 16.

√25 = 5 because the square root of 25 is a whole number (5) that, when squared, equals 25.

Now we can substitute these simplified values back into the original expression:

√16•25 = 4•5 = 20.

Therefore, the simplified expression is 20.