Evaluate the integral. HINT [See Example 4 or use a shortcut (page 970) If applicable.] 6 X dx - 2x2 3 Need Help? _ 8. [/1 Points] DETAILS WANEFMACS 13.4.045. 0/50 Submissions Used MY NOTES ASK YOUR TEACHER Calculate the total area of the region described. Do not count area beneath the X-axls as negative. HINT [See Example 6.] Bounded by the line y = X, the xaxis, and the linesx = 0 and x = 9 Need Help? 9. [-I1 Points] DETAILS WANEFMACS 13.4.046. 0/50 Submissions Used MY NOTES ASK YOUR TEACHER Calculate the total area of the region described in the exercise. Do not count area beneath the x-axis as negative. HINT [See Example 6.] Bounded by the line y = 4x, the x-axls, and the lines x = 2 and x = 4 10. [-/1 Points] DETAILS WANEFMAC5 13.4.047. 0/50 Submissions Used MY NOTES ASK YOUR TEACHER Calculate the total area of the region described. Do not count area beneath the x-axis as negative. HINT [See Example 6.] Bounded by the curve y = v x, the x-axis, and the lines x = 0 and x = 25 Need Help? Practice It 11. [-/1 Points] DETAILS WANEFMAC5 13.4.055. 0/50 Submissions Used MY NOTES ASK YOUR TEACHER The marginal cost of producing the xth box of light bulbs is 5 + x2/1,000 dollars per box. Determine how much is added to the total cost by a change in production from x = 50 to x = 80 boxes. HINT [See Example 5.] $ Need Help? Watch It Practice It 12. [-/1 Points] DETAILS WANEFMAC5 13.4.056. 0/50 Submissions Used MY NOTES ASK YOUR TEACHER The marginal revenue of the xth box of flash cards sold is 200e-0.004x dollars per box. Find the revenue generated by selling items 101 through 3,000. HINT [See Example 5.] (Round your answer to the nearest cent.) $ Need Help? Watch It Practice It