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alexandr402 [8]
3 years ago
7

The diameter of a £1 coin is 22.5 mm. Work out its circumference to the nearest centimetre.Required to answer. Single choice.

Mathematics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

7

Step-by-step explanation:

Circunference:

The circunference of a circle with diameter d is given by:

C = d\pi

The diameter of a £1 coin is 22.5 mm.

Each mm has 0.1 cm, so the diameter, in cm, is of d = 2.25. Then

C = 2.25\pi = 7

The circunference is of 7 centimeters.

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Answer:

Can't tell if it went through...

1. Shop A = 2x

2. Shop B = 2x - 580

3. Total = Shop A + Shop B

1949 = 2x + 2x - 580

4. Combine like terms

2x + 2x = 4x

1949 = 4x - 580

5. Add 580 to both sides (to remove -580 from right side)

1949 + 580 = 4x - 580 + 580

2529 = 4x

6. Divide both sides by 4 (to get x)

2529 / 4 = 4x / 4

632.25 = x

7. Shop A = 2x

2 * 632.25 = 1264.50

Shop A = 1264.50

8. Shop B = 2x - 580

2 * 632.25 - 580 = 684.50

Shop B = 684.50

Check: Shop A + Shop B = 1949

1264.50 + 684.50 = 1949

Shop A = 1264.50

Shop B = 684.50

Step-by-step explanation:

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Answer: as a number?

Step-by-step explanation:

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4 0
3 years ago
David can type 90 words a minute.<br> How many words can be typed in 9.5 minutes?
artcher [175]

Answer:

855

Step-by-step explanation:

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2 years ago
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Find a and k so that the given points lie on the parabola (An algebraic solution is required)
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For the given points to lie on the parabola,

a = -3 and k = 10.

An equation of a curve that has a point on it that is equally spaced from a fixed point and a fixed line is referred to as a parabola. The parabola's fixed line and fixed point are together referred to as the directrix and focus, respectively. It's also crucial to remember that the fixed point is not located on the fixed line. A parabola is a locus of any point that is equally distant from a given point (focus) and a certain line (directrix).

According to the question,

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Points A(1,7) and B(4,-2)

For the points to lie on the parabola,

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7 = a + k

Similarly,

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On solving the two equations simultaneously, we get,

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Learn more about parabolas here:

brainly.com/question/4061870

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Answer:

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Step-by-step explanation:

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