Aspool of ribbon holds 6.75 meters. a craft club buys 21 spools.
a. what is the total cost if the ribbon sells for $2 per meter?
b. if the club uses 76.54 meters to complete a project, how much ribbon will be left?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

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)?