)the class boundary between two consecutive classes is
a. the difference of their lower class limits divided by 2
b. the average of their upper class limits
c. the difference of their class midpoints divided by 2
d. the middle point between them
e. the difference of their upper class limits divided 2
f. the average of their lower class limits
g. none of the above.

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

table 3 represents a direct variation function. : )