Consider diffusion inside an enclosed circular tube. let its length (circumference) be 2l. let x denote the arc length parameter where -l lessthanorequalto x lessthanorequalto l. then the concentration of the diffusing substance satisfies: {u_t = ku_xx -l < x

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

Acylinder has volume 45π and radius 3. what is it’s height?

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?