A new car will depreciate in value after it is purchased. Consider a new truck worth $42,000. If the truck depreciates in value by $8400 each year, then write a formula
that gives the value of the truck after n years.
An=42,000-(0.80)
An=42,000-8,400-n
A,=42,000+8,400-n
An=42,000-(1.20)
Which one is it? First, second, third or last?

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)?