Above is a histogram displaying the times taken to scan 10 items at a checkout. It took 16 people between 25 and 35 seconds to scan the items, what is the frequency density for this group?

Step-by-step explanation:

The histogram is not attached; however, the given details is enough to solve the question.

Given

--- Frequency

Required

Determine the frequency density

First, we calculate the class width

The frequency density is:

it’s supposed to be -4+45=41

step-by-step explanation:

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584