Convert pounds to kilograms: 156 lb = kg

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?

How are sas and sss used to show that two triangles are congruent?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers