What is the greatest common factor Of 60 45 and 75

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Find percent notation for 0.008 0.008=

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?