Grade 12 calculus. Multiple choice. Please include rough notes (doesn't have to be fully complete). Answer ASAP

Question 23 [1 point} The gra oh shown is the DERIVATIVE of f. From the derivative's graph, identify the interval graph where f {the original function} is concave up. Graph of I" Q t-Lcu a {3,4} O [-3.-1]& (13] Question 2? [1 point}! What is true at an inflection point? C) f{x}= Q i1x1=o O f "l:x}= O The function is undefined Question 30 (1 point) If f '(x) >0, what is true about f(x)? O It's increasing O it is concave up there O It's decreasing O it has an inflection pointQuestion 31 [1 point] ~'l'ou want to make a box to contain dirt and your pet earthworm. Using a T in by it] in rectangle of cardboard, you cut congruent squares from the corners and fold up the sides. Choose the equation would you use in order to find the maximum volume of dirt finciuo'ing worm} the box can hold? (:3. y=x{?+2x}ll{1+2 x] (.3. y=>{?>}I{1E}x] :3 y=x{?2x}l{1- 2 xi :3 y=[?2x}{102x] Question 32 [1 point} The population of a town it years after zooo is modeled by Pix}. 1ll'ufhat is the best interpretation of P110} = SD? {3. The ayerage change in population oyer the 10 years was 50 people per year. (.3. In 201D, the population was increasing 5U people per year. (.3. It tool: 11] years for the population to increase by 5D people. f '\\ I I _ In 201D, the population was SD people. Question 33 [1 point} The equation of the line tangent toy = $2 l 25!? 1 at): = 1 is: {I} r = 4x -:_3- v = 2.. {-1 'f = 43"