Answer: 191/2 milliliters
Solution: When we graph the rate of dripping rain in terms of time, we get a line whose y-intercept is 15 milliliters per minute and whose x-intercept is 23/5 minutes. The shape formed under the graph is a triangle. To find how much rain gets in as Paul fixes the hole, we find the area of the triangle, which is 1/2 (15 milliliters per minute × 23/5 minutes) = 191/2 milliliters.
Answer: 10 pages per week
Solution: If there are 52 weeks in a year, then there are 104 weeks in 2 years. To find the average number of pages John wrote on an average week, we divide 1,040 pages by 104 weeks and get 10. John wrote an average of 10 pages per week.
