Acar moving 50 miles per he speeds up steadily to 70 miles per he over a period of 30 minutes. how far did it travel during the 30 minute period of acceleration?

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Billie holiday sells children's clothing for sara vaughn's toddler shop. baby blankets sell for $29.99 after a markup rate based on cost of 109%. find the cost and the markup.