Assume that the salaries of elementary school teachers in the United States have a mean of $32,000 and a standard deviation of $3000. If 100 teachers are randomly selected, determine the probability that their mean salary is greater than $32,500. 0.3312 0.9525 0.1312 0.0475 0.4338

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

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.