The scores on a test given to all juniors in a school district are normally distributed with a mean of 75 and a standard deviation of 7.

find the percent of juniors whose score is no more than 89.

the percent of juniors whose score is 89 or below is %

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?