3. (10 points. To earn all points: Evaluate the definite integral correctly.) Use a definite integral and the techniques in Section 4.3 to determine the exact area under the graph of the function(x)ve th val [L.e. 4. (10 points. To earn all points: Evaluate the definite integral correctly.) Evaluate the definite integral. Remember to write the root as a fractional exponent: (2) dx