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docker41 [41]
3 years ago
13

A child rolls a ball on a level floor 3.6 m to another child. if the ball makes 18.0 revolutions, what is its diameter?

Mathematics
1 answer:
victus00 [196]3 years ago
3 0
To find the diameter, find the circumference, i.e the length covered in one revolution, and then subject the diameter from formulas.

Circumference = 3.6 ÷ 18 = 0.2m = 2πr

πr = 0.2 ÷ 2 = 0.1

r = 0.1 ÷ (22/7) = (0.1 * 7) ÷ 22 = 0.7 ÷ 22

r = 0.0318

Diameter = 2r

Diameter = 2 * 0.0318 = 0.0636m ...//Ans ...
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Can someone please help help with this question!
Mama L [17]

Answer:

6 x 8 = 48

Step-by-step explanation:

An educated guess.

3 0
3 years ago
Read 2 more answers
Find the measurement of sides
mestny [16]

Answer:

(a) a ≈ 22.7 meters, (b) c ≈ 10.6 meters, (c) ∠A = 65°

Step-by-step explanation:

assuming side a/c is side BC/AB since it's opposite of angle A/C

(a) SOH CAH<em>(cos = </em><em>adjacent side/hypotenuse</em><em>)</em> TOA

=> cos (25°) = BC/AC or a/b

=> cos (25°) = a/25

=> a = cos (25°) × 25

=> a ≈ 22.7

(b) SOH<em>(sin = </em><em>opposite side/hypotenuse</em><em>)</em> CAH TOA

=> sin (25°) = AB/AC or c/b

=> sin (25°) = c/25

=> c = sin (25°) × 25

=> c ≈ 10.6

(c) 180° - 25° - 90°(the right angle) = 65°

7 0
3 years ago
Dividing and Multiplying functions
Likurg_2 [28]
Ok, so first of all, you need to plug the functions into their places. Since f(x) = 6x and g(x) = x + 3, you'll plug them in accordingly:
(6x) * (x + 3).

Then you'll multiply them together to get 6x^2 + 18x. You can't combine like terms then because of the square in the first term.

So your final answer is 6x^2 + 18x.

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4 0
4 years ago
Casey was twice as old as his sister 3 years ago. Now he is 5 years older than his sister. How old is Casey?
Margarita [4]
Let x is Casey's sister age.
<span>3 years ago: 
</span><span>Casey was twice as old as his sister: 2a - 3
Now: 
</span><span>he is 5 years older than his sister: a + 5

2a - 3 = a + 5
subtract a to both sides
2a - 3 -a = a + 5 - a
simplify
a - 3 = 5
add 3 to both sides
a - 3 + 3 = 5 + 3
simplify
a = 8

His sister age is 8 years old now.
</span>Now: 
he is 5 years older than his sister: a + 5 = 8 + 5 = 13
<span>
proof: 
so 3 years ago,
his sister age: 8 - 3 = 5
Casey age 3 years ago:
13 - 3 = 10 (</span>C<span>asey was twice as old as his sister 3 years ago</span>)
<span>
Answer:
Casey is 13 years old now.


</span>
4 0
4 years ago
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nata0808 [166]

Answer:

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Step-by-step explanation:

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Overall the answer is 4:49

8 0
2 years ago
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