Someone earns a commission she makes 4.5% of the amount she sells she sold 800$ worth of cloths how much was her commission

Which value would be a solution for x in the inequality 47-4x< 7

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

We just started the introduction into circles and i have no idea how to do this.