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1 year ago

A leather ball has a diameter of 28.4 cm. Which is the area of the piece of leather used on the surface of the ball?

Mathematics

2 answers:

MrRissso [65]1 year ago

7 0

Answer:

has the same diameter as the sphere, and height equal to its diameter. ... The surfce area of a soccer ball is 250 square inches. ... An official basketball has a radius of 12.5 cm and ... much leather is required to cover 12 official.

Step-by-step explanation:

Varvara68 [4.7K]1 year ago

5 0

Answer:

2534 cm^2 to the nearest whole number.

Step-by-step explanation:

The ball is a sphere whose surface are is 4 pi r^2

The radius r = 1/2 diameter = 1/2 * 28.4

= 14.2 cm.

The required area = 4 * pi * 14.2^2

= 2533.88 cm^2

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A cake has a mass of 2.5kg. It contains 275g of fruit. What percentage of fruit is there in the cake

Travka [436]

The answer is: "11 %" .
__________________________________
There is 11% of fruit in the cake.
______________________________
Explanation:
____________________________________

275g is what percent of 2.5 kg?

First, convert "275 g" into "kg".

Note the exact conversion: 1000 g = 1 kg .

So 275 g = (275/1000) kg = 0.275 kg .

0.275 kg = (n/100) * 2.5 kg ;

→ (n/100) * 2.5 = 0.275 ;
____________________________
Divide each side by "(2.5)"
______________________
→ (n/100) = (0.275) / (2.5) ;

→ (n/100) = 0.11 ;

Multiply each side by "100" ;

n = 11 .
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The answer is: 11 % .
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2 years ago

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The principal is collecting data to determine how many graduation tickets will be needed by students at the next graduation. She

nadya68 [22]

*100% Correct answers

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Question 2

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2 years ago

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Can you simplify before multiplying 14×25/27

castortr0y [4]

Answer:

No.

Step-by-step explanation:

You can not simplify this expression before multiplying it, because no whole numbers go into both 14 and 27, and also no whole numbers go into both, 25 and 27. This is the correct answer to this question.

Hope this helps!!!

Kyle.

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1 year ago

3 lines are shown. A line with points T, R, W intersects with a line with points S, R, V at point R. Another line extends from p

Marrrta [24]

Answer:

The vertical angles are ∠ WRS and ∠ VRT ⇒ 2nd answer

Step-by-step explanation:

* Lets explain the meaning of the vertical angles

- Vertical angles are the angles opposite to each other when two lines

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- The vertical angle are equal in measures

- Look to attached figure which represents the lines

∵ Line TW intersects line SV at R

∴ ∠ WRV and ∠ SRT are vertical angle

∴ ∠ WRS and ∠ VRT are vertical angle

∵ RU is between the rays of angle VRW

∴ RU intersects the lines TW and SV at R

∴ No vertical angles between RU and the other two lines because

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* Now lets look to the answer to chose the right one

- ∠ WRU and ∠ SRT are not vertical angles

- ∠ WRS and ∠ VRT are vertical angles 

- ∠ VRU and ∠ TRS are not vertical angles

- ∠ VRT and ∠ SRT are not vertical angles

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The ratio of Melanie's allowance to Jacob's allowance is 4.1 to 20.5. If Jacob gets $5.00, how much allowance does Melanie get?

BartSMP [9]

If Melanie get's 4.10$, then Jacob get's 20.50$.

We can divide to get the unit rate:

20.50 ÷ 4.10 = 5

This means that if Jacob gets 5$, then Melanie will get 1$.

So in this case, Melanie get's 1$.

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1 year ago

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