4. Oxalic acid is one of the finest available wood-bleaching agents. It is an acid, and the concentration used is critical to both safety and the bleaching result. Daulton plans to use the acid on a wood table to lighten dark streaks and colorations in the wood so that the wood will stain to a uniform colour. He finds two solutions in the workshop. Solution 1 has a concentration of 0.05 g/mL, and Solution 2 has a concentration of 0.01 g/mL. He starts with 150 mL of Solution 1 and needs to add Solution 2 to get a final solution with a concentration of 0.025 g/mL. He uses the following formula to determine the amount of Solution 2 required: C (x)= amount of oxalic acid in Solution 1+ amount of oxalic acid in Solution 2 amount of Solution 1+ amount of Solution 2 For this question, after substituting known values, the following rational equation is obtained: 0.025 = (0.05)(150)+ 0.01x 150+ X a. Determine how much of Solution 2 needs to be added. 5. Suppose you need to move many tonnes of gravel and you have two trucks available. One truck is capable of completing the job in 15 trips, while the other truck is capable of completing 1 the job in 25 trips. To solve the following questions, notice that one truck completes of the 15 1 job each trip and the other truck completes of the job each trip. 25 a. How much of the job is completed if the two trucks make one trip together? b. How many trips are required to complete the job if the two trucks travel together? c. Suppose that one truck can complete the job in n trips and the other truck can complete the job in 120 trips. Write an equation to represent the total number of trips, T, required if the two trucks work together. d. If 55 trips are required when the two trucks in question 1.c. work together, how many trips would it take for the first truck to complete the job alone?