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3 years ago

5 times 2/12=_ 4 times 2/3=_ 6 times 2/6=_ 2 times 4/8=_ 3 times 1/2=____

Mathematics

2 answers:

zvonat [6]3 years ago

6 0

Answer:

1) .8333 2) 2.6666 3) 2 4) 1.5

Step-by-step explanation:

uysha [10]3 years ago

3 0

Answer:

1) .8333 2) 2.6666 3) 2 4) 1.5

Step-by-step explanation:

I just used a calculator.

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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

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

3 0

3 years ago

Read 2 more answers

Points R, T, S, and Q are

Sladkaya [172]

Neither collinear nor coplanar.
All of the points would have to be on the same line to make them collinear, and they would also have to be on the same plane to make them coplanar. We can see in the diagram that not all of the points are on a line, and that some are at different heights than others.

6 0

3 years ago

aliya0001 [1]

C is correct
(im taking quiz)

6 0

3 years ago

Read 2 more answers

Can anyone teach plsssss........................ Given that PR= 17cm and SR= 6cm.Find the length, in cm of TS.

Lemur [1.5K]

Answer:

9cm

Step-by-step explanation:

Since PQST is a rectangle, ∠QST=∠QSR=∠90º. So triangle QSR is a right triangle.
By the Pythagorean Theorem and that SR=6 and QR=10, we can say that 6^2+b^2=10^2. So, 36+b^2=100. And b^2=64 and b=8. So QS=8.
Now we know that QS=PT=8.
By the Pythagorean Theorem and that PR=17 and PT=8, we can say a^2+8^2=17^2. So, a^2+64=289. And a^2=225 and a=15.
We know that TR=15 and SR=6 and TR-SR=TS, so 15-6=9.

8 0

3 years ago

Which is the sum of 14t/10t^2 + 5t^2+40t/10t^2

Softa [21]

Answer:

7t/5^3 + 5t^2 + 4t^3

Step-by-step explanation:

4 0

3 years ago

5 times 2/12=___ 4 times 2/3=___ 6 times 2/6=___ 2 times 4/8=___ 3 times 1/2=____

5 times 2/12=_ 4 times 2/3=_ 6 times 2/6=_ 2 times 4/8=_ 3 times 1/2=____