Hi I need help with both questions #1 and questions 2, 9, and 14 please

7:46 webassign.net 9. [0.5/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 10.2.042.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Determine where the graph of the function is concave upward and where it is concave downward. (Enter your answers using interval notation. If the answer cannot be expressed as an interval, enter EMPTY or .) g (x) = 5+ x 2 concave upward (-V15,0 ), (V15, 00) concave downward (-00, - V15 ), (0,V15 ) Viewing Saved Work Revert to Last Response 10. [1/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 10.2.058.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the inflection point(s), if any, of the function. (If an answer does not exist, enter DNE.) g(x) = 3x4 - 6x3 + 2 (x, y) = 0,2 (smaller x-value) (x, y) = (1, - 1 (larger x-value) 11. [1/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 10.2.062.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the inflection point(s), if any, of the function. (If an answer does not exist, enter DNE.) f(x) = (x - 11)4/3 (x, y) = DNE Need Help? Watch It 12. [1/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 10.2.074.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist, enter DNE.) f (t ) = 2t+- relative maximum (t, f) = ( V6 2 - 2V6 relative minimum (t, n) = ( 2 2V6 " ) 13. [1/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 10.2.078.NVA MY NOTES ASK YOUR TEACHER Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist, enter DNE.) 9 ( x) = x2 + - + 3 .. .7247 .III '5' E} i webassignnet 117411- L)" t relative maximum (t, f) : ( relative minimum (t. f) = ( 13. [111 Points] PREVIOUS ANSWERS TANAPMATH? 10.2.078.NVA ASK YOUR TEACHER Find the relative extrema, If any, of the function. Use the Second Derivative Test If applicable. (If an answer does not exist, enter DNE.) :zi g(x) X+X relative maximum (X, Y) =( DNE ( ) relative minimum (X, Y) :( 1:3 V ) Need Help? _ 14. [0.75/1 Paints] PREVIOUS AN SWE RS TANAP MATH7 1.Z.098.NVA ASK YOUR TEACHER PRACTICE ANOTHER The total annual revenue R of Miiarnar Resorts Hotel is related to the amount of money X the hotel spends on advertising its services by the function Rm = o.oo3x3 + 1.35x2 + 2x + 3000 (o s x s 400) where both R and x are measured in thousands of dollars. (a) Find the interval where the graph of R is concave upward and the interval where the graph of R is concave downward (Enter your answers using interval notation. If the answer cannot be expressed as an interval, enter EMPTY or a.) concave upward (0,150) ( concave downward (150,400) What is the inection point of the graph of R? (x, y) = ( (150, 28550) x ) (b) Would it be more benecial for the hotel to increase its advertising budget slightly when the budget is $140,000 or when it is $160,000? o It would be more beneficial for the hotel to increase its advertising budget slightly when the budget is $140,000. 0 It would he more beneficial for the hotel to increase its advertising budget slightly when the budget is $160,000. Need Help? _ 15. [1\" Points] PREVIOUS ANSWERS TANAPMATHT 10.2.109.NVA ASK YOUR TEACHER Determine whether the statement is true or false. [fit is true, explain why it is true. If it is false, give an example to show why it is false. If the graph of f is concave upward on (a, c) and concave downward on (:1 b), where a 0, the rate of change of the average cost function is positive for all x > O. O Since the marginal average cost function is positive for x > 0, the rate of change of the average cost function is negative for all x > 0. 0 Since the marginal average cost function is positive for x > 0, the rate of change of the average cost function is positive for all x > O. 0 Since the marginal average cost function is negative for x > 0, the rate of change of the average cost function is negative for all x > 0. I Need Help? 3. [1H Points] PREVIOUS ANSWERS TANAPMATH7 9.8.009NVA ASK YOUR TEACHER PRACTICE ANOTHER Williams Commuter Air Service realizes a monthly revenue represented bv the following function, where R(x) is measured in dollars and the price charged per passenger is x dollars. R(x) = 3200;: - 8on (a) Find the marginal revenue R'ix). R'(x) = 32007 1601 I (b) Compute the following values. e a