This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
QUESTION 14 Step 1: Identify the percentage of stain left. The question asks how long it takes to remove 50% of the stain. If 50% is removed, then 100\% - 50\% = 50\% of the stain is left. Step 2: Locate 50% on the Y-axis (Percentage of stain left). Step 3: Trace horizontally from 50% on the Y-axis to intersect the curve. Step 4: Trace vertically down from the intersection point to the X-axis (Time soaked). The time corresponding to 50% stain left is approximately 2.5 minutes. The correct option is B. B. 2.5 minutes QUESTION 15 Step 1: Locate 4 minutes on the X-axis (Time soaked). Step 2: Trace vertically up from 4 minutes to intersect the curve. Step 3: Trace horizontally from the intersection point to the Y-axis (Percentage of stain left). At 4 minutes, approximately 30% of the stain is left. Step 4: Calculate the percentage of stain removed. Percentage removed = 100\% - Percentage left Percentage removed = 100\% - 30\% = 70\%. Note: The question asks for the percentage of stain removed, which is 70%. However, 70% is not among the given options. Option B is 30%, which is the percentage of stain left. Assuming there might be a slight misphrasing in the question and that it intends to ask for the percentage of stain left, we select 30%. The correct option is B (interpreting as percentage left). B. 30\% QUESTION 16 Step 1: Locate 10 minutes on the X-axis (Time soaked). Step 2: Trace vertically up from 10 minutes to intersect the curve. Step 3: Trace horizontally from the intersection point to the Y-axis (Percentage of stain left). At 10 minutes, approximately 20% of the stain is left. The correct option is D. D. 20\%