4. [-/1 Points] DETAILS SESSCALC2 6.3.035. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Make a substitution to express the integrand as a rational function and then evaluate the integral. (81 VX dx ( Let u = Vx.) Need Help? Read It Submit Answer 5. [-/1 Points] DETAILS SESSCALC2 6.3.513.XP. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use a graph of f(x) = 1 / (x2 - 6x - 7) to decide whether f(x) dx is positive or negative. Use the graph to give a rough estimate of the value of the integral and then use partial fractions to find the exact value. (Only give the exact value for your answer.) Need Help? Read it Watch It Submit Answer 2. [0/1 Points] DETAILS PREVIOUS ANSWERS SESSCALC2 4.2.011. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. sin Vxdx , n = 4 -3.318 X Need Help? Read It 6. [-/1 Points] DETAILS SESSCALC2 6.6.057. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Determine how large the number a has to be so that - dx Need Help? Read It Watch It