What is the ratio of blue marbles to the total number of marbles in Morgan’s collection

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

Find the area of a parallelogram with base 15 yards and height 21 2/3