Business, 21.06.2021 20:30 jynaepooh

The demand for personal computers has been estimated to be Q = 500,000 – 700P +200I - 500S. Assume that per capita income I is $13,000 and the average price ofsoftware S is $400.When the price of personal computers is P = $3,000, the priceelasticity of demand is:.a. –2.625b. –7.0c. –1.0d. –21.0e. –4.25

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Answer from: goodluck99

The price elasticity of demand is: -2.625

Explanation:

Given

Q = 500000 - 700P +200I - 500S --- the demand

$I =\$13000$ --- per capita income

$S = \$400$ --- average price of software

$P = \$3000$ --- price of computer

Required

The price elasticity of demand

Substitute values for I and S in: Q = 500000 - 700P +200I - 500S

Q = 500000 - 700P +200*13000 - 500*400

Collect like terms

Q = 500000 +200*13000 - 500*400- 700P

Q = 2900000- 700P

The price elasticity (n) is then calculated using:

$n =\frac{P}{Q} * \frac{dQ}{dP}$

Q = 2900000- 700P

Differentiate

$\frac{dQ}{dP} = -700$

Calculate Q when $P = \$3000$

Q = 2900000- 700*3000

Q = 800000

So, we have:

$n =\frac{3000}{800000} * -700$

$n =-\frac{3000* 700}{800000}$

$n =-\frac{2100000}{800000}$

$n =-\frac{21}{8}$

n =-2.625

Answer from: Quest

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.

Answer from: Quest

Secured loans are protected by collateral security. examples: title loans where the borrower uses the car title as collateral security interest rates are lower and repayments are longer therefore risk is low as a collateral security is given as guarantee to the bank in case of failure to pay the loanunsecured loans are not protected by collateral security but it is given on the creditworthiness of the borrower, trusting that she/he will pay on time. examples; payday loans is a short term loan where the borrower lends money from the bank and pays is back when the borrower receives his/her wages.interest rates are high and repayments are shorter. but the risk is high as no collateral security is given as a guarantee to the bank for payment of the loan

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The demand for personal computers has been estimated to be Q = 500,000 – 700P +200I - 500S. Assume t...

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