The answer is 5.6! Hope I helped!
Anything to a negative power makes it inverse and 1/2 power is just square root.
Therefore 49^-1/2 is 1 divided by the square root of 49. The square root of 49 is 7 so the answer is 1/7.
So, if each one costs $54.99
Let "X" be the number of games sold, Let R(X) be the revenue

This function is continuous
It was -15, but it was then 25.
25 + 15 = 40
It rose 40 degrees.