In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points.

find the interval about the sample mean such that the probability is 0.90 that the mean number lies within the interval.

b.an increase in a causes b to decrease

the correct answer is x/3+10≥32

hope this !

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb