Determine the domain in which of the following function is decreasing

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?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Which of the following parabolas opens down?