26/Sin(29) =28/Sin(C) ..... cross multiply..... 28sin(29) =26Sin(C) ..... 13.57=26Sin(C)..... divide 26.... .522=sin(C) .... sin^-(.522) .... Sin(C)=
31.47
Answer: -23 feet
Stephen would be working 2 levels under ground level
11.5 feet X 2= 23 feet BUT it is underground level meaning a negative so therefor the answer is: -23 feet
Part A: Points C and F can be isolated by a single line parallel to a line through A and B. Such a line might be the boundary of an inequality such as
7x -9y > -5If you want two inequalities, you could use
y < 2
x > 0These will graph as dashed horizontal and vertical lines, with shading below and to the right. The doubly-shaded area will include points C and F.
Part B: One can verify that points C and F are solutions to the system of inequalities either by putting their coordinates into the inequalities, or by consulting the graph.
Part C: You can identify the houses of interest to Erica by graphing the inequality and identifying the points that are in the solution space. In the attached graph, that inequality is graphed in pink. The houses of interest to Erica are shown to be A, C, E, F. Houses B and D are not in the solution space.