The waiting times for an elevator are normally distributed with a mean of 1.5 minutes and a
standard deviation of 20 seconds. What wait
time , in seconds, is 3 standard deviatons below
the mean?

Find the interior angle of a regular polygon which has 6 sides

Which equation represents h for right triangle abc

Megan is making bracelets to sell to earn money for the local animal shelter. it takes her 1/4 hour to pick out all the beads and 1/10 hour to string them.this week, she only has 5 1/4 hours to make bracelets. how many bracelets will megan be able to make?