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3 years ago

6

The cd club offers a discount when you purchase 3 or more cd’s. If the price of each cd is reduced by $1.50 and the cost of 3 cd

’s is $35.97, find the original price of each cd.

1 answer:

Natali5045456 [20]3 years ago

4 0

11.99 per cd's your welcome

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Studentka2010 [4]

Answer:

The area of the shaded portion of the figure is $9.1\ cm^2$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The shaded area is equal to the area of the square less the area not shaded.

There are 4 "not shaded" regions.

step 1

Find the area of square ABCD

The area of square is equal to

$A=b^2$

where

b is the length side of the square

we have

$b=4\ cm$

substitute

$A=4^2=16\ cm^2$

step 2

We can find the area of 2 "not shaded" regions by calculating the area of the square less two semi-circles (one circle):

The area of circle is equal to

$A=\pi r^{2}$

The diameter of the circle is equal to the length side of the square

so

$r=\frac{b}{2}=\frac{4}{2}=2\ cm$ ---> radius is half the diameter

substitute

$A=\pi (2)^{2}$

$A=4\pi\ cm^2$

Therefore, the area of 2 "not-shaded" regions is:

$A=(16-4\pi) \ cm^2$

and the area of 4 "not-shaded" regions is:

$A=2(16-4\pi)=(32-8\pi)\ cm^2$

step 3

Find the area of the shaded region

Remember that the area of the shaded region is the area of the square less 4 "not shaded" regions:

so

$A=16-(32-8\pi)=(8\pi-16)\ cm^2$

---> exact value

assume

$\pi =3.14$

substitute

$A=(8(3.14)-16)=9.1\ cm^2$

8 0

3 years ago

olga worked 37.5 hours last week qt the library and earned $12.50 an hour. if she gets a $2.50 per hour raise, how many hours wi

Airida [17]

(37.5)(12.5)=x(15)
468.75=15x
x=31.25

she will have to work 31.25 hours in order to earn the same amount of money

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2 years ago

5) What is the distance between the points (3,-5) and (5,6)?

Afina-wow [57]

B 11.2 Have a good day :)

7 0

2 years ago

This week, 300 tickets were sold to the school play. This is 120 percent of the number of tickets sold last week for the school

skad [1K]

Answer:

the awnser is 250 i took the test and got it correct

Step-by-step explanation:

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2 years ago

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A carpenter makes wooden chairs.

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Answer:

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2 years ago