Name BIK 1. Sheet Metal Trades The length of the arc of a sector of a circle is given by the formula L - 2TRa 360 R is the radius of the circle and a is the central angle in degrees (see figure at left). (a) Solve for a. (b) Solve for R. (c) Find L when R = 10 in. and a = 30. Use T = 3.14. 6. Sports and Leisure The volume of a football is roughly V = TILT 6 , where L is its length and T is its thickness. (a) Solve for L. (b) Solve for 72. 8. Carpentry The projection or width P of a protective overhang of a roof is determined by the height 7 of the window, the height H of the header above the window, and a factor F that depends on the latitude of the construction site. PT+H F Solve this equation for the header height H