Of building code regulation which requires that the slope of the riser to the tread of a staircase be 60% with an absolute deviation of 10%. find the maximum and minimum slopes of the staircase.

10% either side of 60% (about 31°) makes the minimum slope 54% (about 28°) and the maximum slope 66% (about 33°).

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this