Tim Worker is doing his budget. He discovers that the average electric bill for the year was $206.00 with a standard
deviation of $10.00. What percent of his expenses in this category would he expect to fall between $184.00 and
$200.00?
The z for $184.00 = -
The percent of area associated with $184.00 =
The z for $200.00 = -
The percent of area associated with $200.00 =
Subtracting the two percentages, the percent of expenses between $184.00 and $200.00 is

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).

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