please help me

Q1

Graph the function. Then estimate any relative extreme. x) = 7x5 7 5x5 + 49x4 +122x3 7 315x2 7 900x + 7.000 Graph the function. Choose the correct graph below. gm .1, a. QC 90 ~ Q Q Q Q I q Q o. I. a a a x=[710,0] x=[710,10] x=[71o.0] x=[710,01 v =[-10000,10000] Y= [0,0000] Y = [ 7 4200020000] Y = [7 2000042000] Estimate any relative maxima. Select the correct choice below and if necessary: ll in the answer box to complete your choice. 0 A. (Round to three decimal places as needed. Use a comma to separate answers as needed. Type an ordered pair.) C) B. There are no relative maxima. Estimate any relative minima. Select the correct choice below and, if neecssary, ll in the answer box to complete your choice. 0 A. [Round to three decimal places as needed. Use a comma to separate answers as needed. Type an ordered pair.) C) B. There are no relative minima. A person coughs when a foreign object is in the windpipe. The velocity of the cough depends on the size of the object. Suppose a person has a windpipe with a 22-mm radius. If a foreign object has a radius r, in millimeters, then the velocity V, in millimeters/second, needed to remove the object by a cough is given by the following equation, where k is some positive constant. For what size object is the maximum velocity needed to remove the object? V(r) = k (2212 - 3), Osis 22 An object that has a radius of will need maximum velocity to remove it. (Type an integer or a simplified fra mm mm/second mm