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3 years ago

Find the circumference of the circle below. (Use 3.14 for Pi)

Mathematics

2 answers:

Vedmedyk [2.9K]3 years ago

6 0

Answer:

C. 31.4 cm

Step-by-step explanation:

→The formula for finding the circumference of a circle is:

C = 2πr

→However, it states that we use 3.14 for π:

C = 2(3.14)r

→The "r," is the radius, which is a straight line from the perimeter to the center. In this case, it is already given to us as 5 cm.

C = 2(3.14)(5)

C = 31.4

ipn [44]3 years ago

3 0

so the right answer is 31.4 cm(option C)

please see the attached picture for full solution 

Hope it helps

Good luck on your website

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The sum of an infinite geometric series is three times the first term. Find the common ratio of this series.

adelina 88 [10]

Answer:

$\frac{2}{3}$

Step-by-step explanation:

The sum of an infinite geometric series is expressed according to the formula;

$S_\infty = \dfrac{a}{1-r}$ where;

a is the first term of the series

r is the common ratio

If the sum of an infinite geometric series is three times the first term, this is expressed as $S_\infty = 3a$

Substitute $S_\infty = 3a$ into the formula above to get the common ratio r;

$3a = \dfrac{a}{1-r} \\\\$

$cross \ multiply\\\\3a(1-r) = a\\\\3(1-r) = 1\\$

open the parenthesis

$3 - 3r = 1\\\\$

subtract 3 from both sides

$3 - 3r -3= 1-3\\\\-3r = -2\\\\r = \frac{2}{3}$

Hence the common ratio of this series is $\frac{2}{3}$

3 0

3 years ago

assume that 2000 births are randomly selected and 64 of the births are girls. use subjective judgment to describe the number of

tatuchka [14]

Total no. of births = 2000

Births of girls = 64

Birth% of girls

$= \frac{64}{2000} \times 100$

$= \frac{64}{20}$

$= \frac{6.4}{2}$

$= 3.2\%$

Hence, the number of girls are significantly low.

4 0

3 years ago

Find the variable h+ 1/2 = 3 1/4

Elena L [17]

Answer:

h=2 3/4

Step-by-step explanation:

2 3/4+1/2=

you can convert 1/2 into 2/4 so they have like denominators

2 3/4+2/4= 2 5/4 which is also equal to 3 1/4

7 0

3 years ago

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Kipish [7]

I think the best answer is d since 18x + 16x

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3 years ago

Solve using any method. All work must be shown and handwritten.

Rashid [163]

Answer:

$x = - 3$

$y = 1$

Step-by-step explanation:

Write the system

$3x - y = - 10$

$x + y = - 2$

Solve by Elimination.

multiply the second equation by -3.

$3x - y = - 10$

$-3x - 3y = 6$

Add the Equations.

$- 4y = - 4$

$y = 1$

Plug this back in one of the equations.

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$x = - 3$

8 0

3 years ago

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