Sara wants to purchase new equipment for her home office. The sales tax rate that will apply when she makes her purchase is 6%. Here is a list of items she wants to purchase: keyboard, $9.99
mouse, $14.99
22-inch monitor, $99.99
chair, $129.99
If Sara has $275 to spend on new equipment for her home office, she
be able to purchase all of the items on her list because the total of her purchase after applying sales tax is
BLANK ONE:
Will
Will not

BLANK TWO:
$254.96
$270.26
$272.81
$277.91

$

Answers:

Explanation:

Add up the prices given to get

9.99+14.99+99.99+129.99 = 254.96

This is the total amount before tax.

Now let's calculate the tax based on this subtotal.

6% of 254.96 = 0.06*254.96 = 15.2976 which rounds to 15.30. So the sales tax is $15.30 which is added on top of the previous subtotal which gets us 254.96+15.30 = 270.26

A different way to get this is to multiply 254.96 by 1.06 and you should get 270.2576 which rounds to 270.26

Assuming there are no other taxes, fees or surcharges, the value $270.26 is the grand total that Sara will have to pay if she wants all of those items.

Since $270.26 is smaller than $275, this means she will be able to purchase all of the items. Her change will be 275-270.26 = 4.47 dollars.

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.

answercontrol is returned to method c;