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3 years ago

-4r>16 I have to solve this for my math hw

Mathematics

1 answer:

WITCHER [35]3 years ago

6 0

Answer:

r<-4

Step-by-step explanation:

when inequality is divided by a negative number the sign changes to next direction.

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The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the ar

mafiozo [28]

Answer:

$Ratio = \frac{R^2 - r^2 }{ r^2}$

Step-by-step explanation:

Given

See attachment for circles

Required

Ratio of the outer sector to inner sector

The area of a sector is:

$Area = \frac{\theta}{360}\pi r^2$

For the inner circle

$r \to radius$

The sector of the inner circle has the following area

$A_1 = \frac{\theta}{360}\pi r^2$

For the whole circle

$R \to Radius$

The sector of the outer sector has the following area

$A_2 = \frac{\theta}{360}\pi (R^2 - r^2)$

So, the ratio of the outer sector to the inner sector is:

$Ratio = A_2 : A_1$

$Ratio = \frac{\theta}{360}\pi (R^2 - r^2) : \frac{\theta}{360}\pi r^2$

Cancel out common factor

$Ratio = R^2 - r^2 : r^2$

Express as fraction

$Ratio = \frac{R^2 - r^2 }{ r^2}$

6 0

2 years ago

Please show work 26 lbs of onion cost $127.40. How much would 18 lbs cost\

Irina18 [472]

127.40/26 = $4.90 per pound
18 * 4.9 = $88.20
It would cost $88.20

5 0

3 years ago

if 7 dancers were at a dance and 46 more came in and h left and there was 13 dancers left how many was h

TEA [102]

If 7 dancers were at a dance and 46 more came in and h left and there was 13 dancers left how many was h
- h is 70.

5 0

3 years ago

Please Help Me with these problems; Thank you. So much for the help.

stiks02 [169]

Answer to 1st one is d bottom right
2nd is b top right

5 0

3 years ago

2.1 liters of coffee were equally distributed to 30 cups how many millimeters of coffee were in each cup

sattari [20]

Answer: 70 ml of coffee in each cup

Step-by-step explanation:

1 liter = 1000 ml

Amount of coffee given = 2.1 liters

$\Rightarrow$ 2.1 liters = 2.1 * 1000 = 2100 ml

Total number of cups = 30

$\therefore$ Amount of coffee in each cup = $\frac{Total\ amount \ of \ coffee}{number\ of \ cups}$ = $\frac{2100}{30}$ =70

∵ Amount of coffee in each cup = 70 milliliters

4 0

3 years ago

Read 2 more answers