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NeX [460]
3 years ago
7

A machine coats metal spheres with a plastic coating. The metal spheres have a radius of 9 mm the spheres formed by the metal an

d plastic coating have a radius of 12 mm.
How much plastic coating is on each sphere.

Use 3.14 to approximate pi and express your answer in hundredths.
Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0
You need to find the volume of the coated sphere and then take away the volume of the original sphere.
Volume of sphere = 4 thirds x pi  x r cubed

(4 x 3.14 x 12 x 12 x 12) / 3  = 7234.56

(4 x 3.14 x 9 x 9 x 9) / 3 = 3052.08

take away = 4182.48
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Step-by-step explanation:

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6 0
3 years ago
Y =  7x +  3 <br> what is the X and Y intercepts
Neko [114]
To find the x intercept,plug a zero in for y and solve.
To find the y intercept,plug a zero in for x and solve.
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g = 7(0)+3
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(0,3)

y = 7x + 3
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3 0
3 years ago
X-5(x-1)=2x-(2x-3) answer the question
levacccp [35]

Answer: x= 1/2

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

x−5(x−1)=2x−(2x−3)

x−5(x−1)=2x+−1(2x−3)(Distribute the Negative Sign)

x−5(x−1)=2x+−1(2x)+(−1)(−3)

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x+−5x+5=2x+−2x+3

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−4x+5=3

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Step 2: Subtract 5 from both sides.

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Step 3: Divide both sides by -4.

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8 0
3 years ago
Read 2 more answers
Borrow 1 from the whole number to rewrite 8 10/24.
koban [17]

Answer:

A. 7\frac{34}{24}

Step-by-step explanation:

We are given  the expression, 8\frac{10}{24}

On re-writing the expression after borrowing 1, we have,

8\frac{10}{24} = 7(\frac{10}{24}+1)

i.e. 8\frac{10}{24} = 7(\frac{10}{24}+\frac{24}{24})

i.e. 8\frac{10}{24} = 7\frac{34}{24}

Thus, the equivalent expression after borrowing 1 from the given expression is 7\frac{34}{24}.

Hence, option A is correct.

4 0
3 years ago
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