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2 years ago

Circumference of the circle

Mathematics

2 answers:

Alja [10]2 years ago

8 0

Answer:

37 5/7

Step-by-step explanation:

use formular it will be 2pie -22/7 ×radius

since we have been given only radius it will be

2×22/7×6=37 5/7

liraira [26]2 years ago

5 0

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Let's find the circumference of given circle ~

Circumference :

$\qquad \tt \dashrightarrow \: 2\pi{r}^{}$

where, r = radius

Now, let's calculate it ~

$\qquad \tt \dashrightarrow \: c = 2×\pi{}^{}×6$

$\qquad \tt \dashrightarrow \: c = 12\pi\: \: m$

That's the answer I terms of π, but we can also plug in the approximate value of pi as 3.14

$\qquad \tt \dashrightarrow \: c = 12 \times 3.14{}^{}$

$\qquad \tt \dashrightarrow \: c = 37.68\: \: m$

$\qquad \tt \dashrightarrow \: c \approx 37.7\: \: m$

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iren2701 [21]

The Proportion for the 15/11=28/x
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so x=(11*28)/15
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4 years ago

You have to make 1000 buttons.the diameter of the button is 9cm but you have to find it’s area.its $15/m squared and you have to

Semmy [17]

Answer:

$95.38

Step-by-step explanation:

step 1

Find the area of one button

The area is equal to

$A=\pi r^{2}$

we have

$r=9/2=4.5\ cm$ ---> the radius is half the diameter

Convert to meters

$r=4.5\ cm=4.5/100=0.045\ m$

assume

$\pi =3.14$

substitute

$A=(3.14)(0.045)^{2}\\A=0.0063585\ m^2$

step 2

Find the area of 1,00 buttons

Multiply by 1,000

$A=0.0063585(1,000)=6.3585\ m^2$

step 3

Find the cost

Multiply $15 per square meter by the total area of 1,000 buttons

$(15)6.3585=\$95.38$

3 0

3 years ago

Help me Divide please 15 points & mark brainliest

arlik [135]

The answer to the first one is 9/4
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7 0

3 years ago

Suppose that only 65% of all drivers in a certain state wear a seat belt. a random sample of 80 drivers is selected. what is the

jonny [76]

Answer:

Pr(X >42) = Pr( Z > -2.344)

= Pr( Z< 2.344) = 0.9905

Step-by-step explanation:

The scenario presented can be modeled by a binomial model;

The probability of success is, p = 0.65

There are n = 80 independent trials

Let X denote the number of drivers that wear a seat belt, then we are to find the probability that X is greater than 42;

Pr(X > 42)

In this case we can use the normal approximation to the binomial model;

mu = n*p = 80(0.65) = 52

sigma^2 = n*p*(1-p) = 18.2

Pr(X >42) = Pr( Z > -2.344)

= Pr( Z< 2.344) = 0.9905

7 0

3 years ago

You roll two fair dice, a green one and a red one.

olga_2 [115]

Answer:

(a) yes

(b) 1/36

(d) 1/18

Step-by-step explanation:

(a) yes they are independent as the outcome of one does not affect the outcome of the other.

(b) As the dice are fair, each possible number (1 through 6) has the same probability of being rolled.

P(1 on green die) = 1/6

P(2 on red die) = 1/6

Therefore, P(1 on green die) AND P(2 on red die) = 1/6 × 1/6 = 1/36

P(2 on green die) = 1/6

P(1 on red die) = 1/6

Therefore, P(2 on green die) AND P(1 on red die) = 1/6 × 1/6 = 1/36

(d) p[(1 on green die and 2 on red die) OR (2 on green die and 1 on red die)

= 1/36 + 1/36

= 2/36

= 1/18

3 0

2 years ago