PART D: RATIOS AND PROPORTIONS (10 POINTS) Solve the following problems. Round your final answers to the nearest 2 decimal places. 1. 3:5 = 9:X 2. 2.5: y = 4:7 3. Betty and Lois have already invested $ 8960 and $6990 respectively in their partnership. If Betty invests another $5000, what amount should Lois contribute to maintain their investments at the original ratio? A 560- bed hospital operates with 232 registered nurses and 185 other support staff. The hospital is about to open a new 86-bed wing. Assuming the same proportionate staffing levels, how many more nurses and support staff will need to be hired? PART E: TRIGONOMETRY (10 POINTS) Use the definition of the trigonometric ratios to find the trigonometric functions indicated 1. Given cos A = 4/5 Find sin A tan A cot A sec A CSC A 2. Given tan B = 8/15 Find cos B tan B cot B sec B CSC B