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kotykmax [81]
3 years ago
5

Application: Economics. A vector ~p = h150, 225, 375i represents the price in dollars of certain models of bicycles sold by a bi

cycle shop at costs given by the vector ~c = h125, 200, 360i. (a) What is the vector ~r representing the revenue made from selling these bikes? (b) Suppose the shop owner offers a store-wide discount of 10% on the price of the bicycles. How much revenue does he make if he sells 10 o
Physics
1 answer:
DerKrebs [107]3 years ago
6 0

Answer:

a. r=25,25, 15

b. Total revenue =225,225, 135

Explanation:

Application: Economics. A vector ~p = 150, 225, 375

represents the price in dollars of certain models of bicycles sold by a bicycle shop at costs given by the vector ~c = 125, 200, 360.

(a) What is the vector ~r representing the revenue made from selling these bikes? (b) Suppose the shop owner offers a store-wide discount of 10% on the price of the bicycles. How much revenue does he make if he sells 10 o

Lets's simplify the values step by step

A vector p = 150, 225, 375 is the price

vector c = 125, 200, 360.  represent the cost of the bicycle

therefore

vector r=the revenue from selling the bicycle will be

p-c:    

150, 225, 375-(125, 200, 360)

r=(25,25, 15)

b.

if there is a discount of 10% for 10 bicycles, i presume

then the total revenue will be

revenue /one bicycle*10% discount*10 bicycles

to get the

r=(100%(25,25, 15)-10%(25,25, 15))*10

if there is a 10% slash in the price, it means that the item will now be 90% of its price

r=225,225,135

Total revenue =225,225, 135

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Answer:

The image is formed at a ‘distance of 16.66 cm’ away from the lens as a diminished image of height 3.332 cm. The image formed is a real image.

Solution:

The given quantities are

Height of the object h = 5 cm

Object distance u = -25 cm

Focal length f = 10 cm

The object distance is the distance between the object position and the lens position. In order to find the position, size and nature of the image formed, we need to find the ‘image distance’ and ‘image height’.

The image distance is the distance between the position of convex lens and the position where the image is formed.

We know that the ‘focal length’ of a convex lens can be found using the below formula

1f=1v−1u\frac{1}{f}=\frac{1}{v}-\frac{1}{u}

f

1

=

v

1

−

u

1

Here f is the focal length, v is the image distance which is known to us and u is the object distance.

The image height can be derived from the magnification equation, we know that

Magnification=h′h=vu\text {Magnification}=\frac{h^{\prime}}{h}=\frac{v}{u}Magnification=

h

h

′

=

u

v

Thus,

h′h=vu\frac{h^{\prime}}{h}=\frac{v}{u}

h

h

′

=

u

v

First consider the focal length equation to find the image distance and then we can find the image height from magnification relation. So,

1f=1v−1(−25)\frac{1}{f}=\frac{1}{v}-\frac{1}{(-25)}

f

1

=

v

1

−

(−25)

1

1v=1f+1(−25)=110−125\frac{1}{v}=\frac{1}{f}+\frac{1}{(-25)}=\frac{1}{10}-\frac{1}{25}

v

1

=

f

1

+

(−25)

1

=

10

1

−

25

1

1v=25−10250=15250\frac{1}{v}=\frac{25-10}{250}=\frac{15}{250}

v

1

=

250

25−10

=

250

15

v=25015=503=16.66 cmv=\frac{250}{15}=\frac{50}{3}=16.66\ \mathrm{cm}v=

15

250

=

3

50

=16.66 cm

Then using the magnification relation, we can get the image height as follows

h′5=−16.6625\frac{h^{\prime}}{5}=-\frac{16.66}{25}

5

h

′

=−

25

16.66

So, the image height will be

h′=−5×16.6625=−3.332 cmh^{\prime}=-5 \times \frac{16.66}{25}=-3.332\ \mathrm{cm}h

′

=−5×

25

16.66

=−3.332 cm

Thus the image is formed at a distance of 16.66 cm away from the lens as a diminished image of height 3.332 cm. The image formed is a ‘real image’.

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