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Nata [24]
2 years ago
8

Area of ​​the painted part

Mathematics
2 answers:
gregori [183]2 years ago
5 0

Answer:

59.73 cm²

Step-by-step explanation:

2\pi r

2 × π × 7

2 × 3.14 × 7

43.96 ÷ 4

10.99 cm²

11 cm - 7 cm = 4 cm

2\pi r

2 × π × 4

2 × 3.14 × 4

25.12 ÷ 4

6.28 cm²

10.99 cm² + 6.28 cm² = 17.27 cm²

7 cm × 11 cm = 77 cm²

77 cm² - 17.27 cm²

59.73 cm²

kykrilka [37]2 years ago
4 0

Answer:

36

Step-by-step explanation:

7 + 7 + 11 + 11

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Answer:

x ≈ 15.9

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

x² + 6² = 17²

x² + 36 = 289 ( subtract 36 from both sides )

x² = 253 ( take the square root of both sides )

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A 1350 kg car travels at 12 m/s. What is it's kinetic energy
qaws [65]
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KE = 1/2(1350 * 12^2)
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3 years ago
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Can someone help me please.​
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9514 1404 393

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Step-by-step explanation:

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20 people applied for a job. Everyone either has a school certificate or diploma or even both. If 14 have school certificates an
STatiana [176]

Given:

Either has a school certificate or diploma or even both = 20 people

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To find:

The number of people who have a school certificate only.

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Let A be the set of people who have school certificates and B be the set of people who have diplomas.

According to the given information, we have

n(A)=14

n(B)=11

n(A\cup B)=20

We know that,

n(A\cup B)=n(A)+n(B)-n(A\cap B)

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Subtract both sides by 25.

20-25=-n(A\cap B)

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We need to find the number of people who have a school certificate only, i.e. n(A\cap B').

n(A\cap B')=n(A)-n(A\cap B)

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n(A\cap B')=9

Therefore, 9 people have a school certificate only.

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2 years ago
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