31/5 times 3 1/6 in simplest form

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.

In an isosceles triangle, the vertex angle is 112 degrees. what is the measure of each base. a.34 b.24 c.44 d.54

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2