if a firm's profit is z=12x-6x^2+30 and their minimum production level of x is equals to 1.5. then the level of x that maximizes profit
the answer is not 1. i believe this is nonlinear equation and the derivitive may be in play here. if able to provide all the steps

Tan198=asin164=? how to solve this? ?

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.

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)?