Researchers in Australia set up an experiment to test whether walking dogs within parks significantly affected the number of birds in the park . Their treatments consisted of 1) humans walking dogs on a leash; 2) humans walking without dogs, 3) no walkers at all [a no-disturbance control]. Ten minutes after the trial, researchers counted the number of birds observed nearby. Here is what they found:

Which expression is equivalent to (4x^3*y^5)(3x^5*y)^2 \a) 24x^13*y^7b) 36x^13*y^7c) 36x^28*y^7d) 144x^16*y^12

Select a graph that have an equation with a < 0

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?