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kicyunya [14]
3 years ago
6

Both circles have the same center. The circumference of the inner circle is 25.12 millimeters.

Mathematics
1 answer:
stira [4]3 years ago
8 0

Answer:

Step-by-step explanation:

let r be radius of inner circle.

2πr=25.12

πr=25.12/2=12.56

3.14r=25.12

r=12.56/3.14=4

outer radius R=4+4=8 mm

reqd. area=πR²-πr²=π(R²-r²)=3.14(8²-4²)=3.14(64-16)=3.14×48= 150.72 mm²

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Find the value of x.<br> 5x (x+24)
nlexa [21]

Answer:

5x^2+120x

Step-by-step explanation:

5x(x+24)

Step 1: Use distributive property to expand the expression. Multiply 5x separately  with all the terms inside the bracket.

Step 2: 5x(x) = 5x^2

5x(24) = 120x

Answer: 5x^2+120x

Note: If you need to further solve it, you can factor it.

To Factor;

5x^2+120x

Step 1: Factor out the common: 5x

Step 2: 5x times x = x^2

            5x times 24 = 120x

Therefore,

Factored answer: 5x(x+24)

Hope this helps.

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2 years ago
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valkas [14]

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Step-by-step explanation:

We know that a^ -b is equal to 1 / a^b

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Answer:

19 will be the answer.

Step-by-step explanation:

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A scuba diver used the expression below to describe his position in relation to sea level. 2 + (negative 20) + 8 Which statement
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Answer:

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Step-by-step explanation:

The initial number is 2 which is more than  0 that means the diver did not start at a ground  level but above than that.

The negative 20 denotes that he went down the sea level, to the extent of the number provided in feet.

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TiliK225 [7]

Answer:

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Step-by-step explanation:

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