Find the sum. one ninth + one twelfth A. 7 over 36 B. six sevenths C. one over thirty-six D. 1 over 7h plz help fast i am stuck. and thank you
12/14/2020

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?

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

The length of the line segment ac is 8x-9 what is the value of x