a mobile phone company reported a 160% increase in sales in one year. At the start of the year sales were 3 million. What was the sales increase over the year?

And employees salary increase by $4500 which represents a 15% raise what is the employees new salary

Which of the following are accepted without proof in a logical system? check all that apply.

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?