Round 256 and 321 ( need to when rounding in the hundreds place do we not change the entire number?

Place the following steps in order to complete the square and solve the quadratic equation,

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?

If you could answer these your a life saver