The results from a statistics class' first exam are as follows: The mean grade obtained by its 25 students is 83, with a standard deviation of 11. The distribution of grades was unimodal and symmetrical. What is the probability that a student received a grade above 90

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

6 meters

step-by-step explanation:

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24