2000 is deposited into a newly opened fund on January 1, 1999. Another deposit is made into the fund on July, 1 1999. On January 1, 2000, the balance in the fund is 6000. The time-weighted rate of return in 1999 is 8.0% and the dollar-weighted rate of return is 4.8%. Calculate the balance of the fund on July 1, 1999, immediately before the deposit is made. Give your answer rounded to the nearest whole number.

$2,080 is the correct answer to the given question .

Explanation:

As mention in the question the deposited  amount of $2000 was in the year the July, 1, 1999 up to the on the January 1, 2000 it means it takes 1/2 year or 6 months.

Time-weighted rate of the return in the year 1999 is the 8.0%

however it has been spent for the six months, it means the 4% in the 6 month

So the cost of the fund before the investment can be determined by

=

= $2080

Therefore the balance of the fund on the year July 1, 1999= $2080

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.