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3 years ago

Decide if the following is a true or false statement - explain how you know (Explain in words please).

Mathematics

2 answers:

Westkost [7]3 years ago

7 0

Answer:

it's negative and positive and negative + positive is -ive or +ive but in this case they are in equal distance from the number line which makes the answer zero

Yakvenalex [24]3 years ago

5 0

It is negative and positive and the answer is zero

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Is feet bigger than inches

a_sh-v [17]

Yes; each foot contains 12 inches.

Example: 6 feet would be equal to 72 inches.

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3 years ago

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What’s GD Answers a. 20 b. 3 c. 15 d. 12

djverab [1.8K]

Answer:

B. 3

Step-by-step explanation:

16 : 4 = 12 : |GD|

4=12 : |GD|

|GD| = 12 : 4 = 3, Answer is B

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3 years ago

What would be the volume of (a) air (b) plastic in a ball with 25cm diameter made from plastic 2mm thick?

morpeh [17]

Answer:

Part a) The volume of the air is $V=7,794.78\ cm^{3}$

Part b) The volume of the plastic is $V=386.45\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the sphere is equal to

$V=\frac{4}{3}\pi r^{3}$

step 1

Find the volume of the complete ball (air +plastic)

we have

$r=25/2=12.5\ cm$ ------> the radius is half the diameter

substitute

$V=\frac{4}{3}\pi (12.5)^{3}$

$V=8,181.23\ cm^{3}$

step 2

Find the volume of the air

we have that

The plastic is 2 mm thick

Convert to cm

2 mm=2/10=0.2 cm

The radius of the interior of the ball is

$r=12.5-0.2=12.3\ cm$

substitute

$V=\frac{4}{3}\pi (12.3)^{3}$

$V=7,794.78\ cm^{3}$ -----> this is the volume of the air (interior of the ball)

step 3

Find the volume of the plastic

we know that

The volume of the plastic is equal to the volume of the complete ball minus the volume of the air

$8,181.23\ cm^{3}-7,794.78\ cm^{3}=386.45\ cm^{3}$

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3 years ago

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Tema [17]

Answer:

-25 degrees C.

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3 years ago

Megan reads 2 pages of a book each morning

Makovka662 [10]

It’s A because 2+3=5 and 5x7=35

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3 years ago