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3 years ago

I need to know how to solve this PLEASE HELP MY TEST IS COMING UP

Mathematics

1 answer:

vivado [14]3 years ago

8 0

Answer:

Step-by-step explanation:

Problem Green

Look at the white area. Where it meets the green border is the region of a quarter circle. So the quarter circle has a circumference of 1/4 * (2pi) r

r we are to take it, is 10/2 = 5 cm. It is 1/2 the side of the square..

So the perimeter of 1/4 green circle is (2/4) pi * 5 = 1/2 pi * 5 = 2.5*pi

There are 4 such areas.

So we have to multiply by 4

4 * 2.5 = 10 pi

The answer is 10*pi.

An alternate answer is 31.4 cm

Problem Two

Large Circle

Perimeter of the large circle = 2pi*r

r = 14 cm

Perimeter of the large circle= 2* pi * 14 = 28*pi

Small Circle

r = 14/2 = 7 cm

Perimeter = 2*pi*r

Perimeter = 2 * pi * 7

Perimeter = 14 pi

Answer

Total Perimeter = Small Circle + Big Circle

Total Perimeter = 14*pi + 28*pi = 42*pi

Your answer could be 42*3.14 = 131.88

If none of these are right, list your choices.

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3.050904 in standard form

rosijanka [135]

The standard form is also known as the Scientific Notation

So to find the standard form for 3.050904 we need to start counting from 4 until we reach the zero. So let's count :)

I got 6 numbers (but don't count number 3)

Now since the virgule is in front of the 6 number we will have ^-6

Like that : 3050904*10^-6

Why do we have -6 instead of 6 ? well the reason is because we're going on the left side. Because we start counting from right(4) until we reach the left side(0)

I hope that's help and please if you have any suggestion let me know :)

8 0

3 years ago

in a random sample of 77 residents of the state of texas, the mean waste recycled per person per day was 1.01.0 pounds with a st

VikaD [51]

Answer:

(0.63789 ; 1.38211 )

Given that:

Mean, xbar = 1.01

Standard deviation, s = 0.29

Sample size, n = 7

Confidence interval : xbar ± margin of error

Margin of Error = Tcritical * s/sqrt(n)

Degree of freedom (df) = n - 1 = 7 - 1 = 6

Hence Tcritical = 3.143

Margin of Error = 3.143 * 0.29/sqrt(6)

Margin of error = 0.37211

Lower boundary = (1.01 - 0.37211) = 0.63789

Upper boundary = (1.01 + 0.37211) = 1.38211

(0.63789 ; 1.38211 )

learn more of confidence interval here

brainly.com/question/23033127

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2 years ago

"Find the point of intersection for each system of linear equations. Which method did you use & why?"

lisabon 2012 [21]

Set each equation to get Y by its self
Then set the equations equal to each other and solve for X
Easy(:

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4 years ago

Pregunta En cierto supermercado, Monica pagó $ 3,20 por 2 libras de manzanas y 2 libras de naranjas, mientras que Sarah pagó $ 4

madam [21]

Answer:

Step-by-step explanation: 14.2

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3 years ago

I need help with #5

hoa [83]

Answer:

<1 = 50

<2 = 130

Step-by-step explanation:

<1 and 130 are supplementary angles

<1 + 130 = 180

<1 =180-130

<1 = 50

130 and <2 are corresponding angles and corresponding angles are equal when the lines are parallel

<2 = 130

3 0

3 years ago

Read 2 more answers