1. The equation y = -x2 - 2x + 8 is graphed on the set of axes below.
у
→X
Based on this graph, what are the roots of the
equation -- x? - 2x + 8 = 0?
B. 2 and -4
A. 8 and o
D. 4 and -2
C. 9 and -1

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?