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Leviafan [203]
2 years ago
13

The radius of a circle is 7 kilometers. What is the length of a 90° arc?

Mathematics
1 answer:
LUCKY_DIMON [66]2 years ago
4 0

Find the length of the circumference:

Circumference = 2 x pi x radius

Circumference = 2 x 3.14 x 7

Circumference = 43.96 kilometers

90 degrees is 1/4 of a circle ( 360/4 = 90)

Arc length = 43.96/4 = 10.99 kilometers

(Round answer as needed)

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Penjelasan langkah demi langkah:

1)

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= √16*2 +3√9*2-2√25*2

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3/4+\sqrt{2} \\= \frac{3+4\sqrt{2} }{4 }

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= 2√3×√9*2

= 2√3×3√2

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6) 12/3+√3

= 4+√3

7) √1000—2√40

= 10 -2 (√4*10)

= 10-2(2√10)

= 10 - 4√10

8) 2- ¹+3-¹

= \frac{1}{2} + \frac{1}{3}\\ = \frac{3+2}{6}\\ = \frac{5}{6}

9)

\frac{5}{\sqrt{5} }\\ merasionalisasikan\\= \frac{5}{\sqrt{5} }\times \frac{\sqrt{5} }{\sqrt{5} }\\= \frac{5\sqrt{5} }{\sqrt{25} }\\= \frac{5\sqrt{5} }{5}\\ = \frac{\sqrt{5} }{1}

Jika pernyataannya opsional, penyebutnya adalah 1

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7 0
3 years ago
A pancake recipe calls for 4 cups of flour and 3 cups milk.does the recipe calling for 2 cups flour and 1.5 cup milk use the sam
kramer
Yes because if you take 4:3 it equals out to be 2:1.5
5 0
3 years ago
The ratio between the number of students (s) on a field trip and the number of teachers (t) on the field trip is 21/4. There are
RoseWind [281]

Answer:

Step-by-step explanation:

If there needs to be 4 teachers per 21 students, you would divide the total amount of students by 21 and multiply that answer by 4. SO...:

84 ÷ 21 = 4 groups of 21 students.

4 groups × 4 teachers = 16

*** Answer***

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5 0
3 years ago
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kondaur [170]

Answer:

C

Step-by-step explanation:

8×3-4×2=16

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so 16 is greater

7 0
3 years ago
Which of the following is three-dimensional and infinitely large?
dexar [7]

Answer:

Option C Geometric space

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<u><em>Verify each case</em></u>

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case B) A line is infinitely large but is only one-dimensional

case C) Geometric space is three-dimensional and infinitely large

case D) A solid is three-dimensional, but not infinite

therefore

The answer is Geometric space

5 0
3 years ago
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