The temperature (in degrees Celsius) as a function of time (in hours since noon) for a certain day in San Jose, Costa Rica, is graphed. What is the approximate average rate at which the temperature decreases between 3{:}30\text{ pm}3:30 pm3, colon, 30, start text, space, p, m, end text and 8{:}30\text{ pm}8:30 pm8, colon, 30, start text, space, p, m, end text?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?