Round 5,098 to the nearest ten thousand

Iknow the answer but the calculator doesn't seem to give the right one

Solve the inequality 47.75 + x 50 to determine how much more weight can be added to li's suitcase without going over the 50-pound limit. what is the solution set?

The change in water level of a lake is modeled by a polynomial function, w(x). described how to find the x-intercepts of w(x) and how to construct a rough graph of w(x) so that the parks department can predict when there will be no chage in the water level. you may create a sample polynomial of degree 3 or higher to use in your explanations.