Y=4x+9y choose 1 (choice a) a only (-3,3) (choice b) b only (-2,2) (choice c) c both (-3,3) (-2,2) (choice d) neither need asap

Find the value of the cosine for angle a

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

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