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2 years ago

A circle with the diameter of 40 inches. what is the area?

Mathematics

1 answer:

Vsevolod [243]2 years ago

7 0

Answer:

A= 1256

Step-by-step explanation:

The formula for area of a circle is $A=\pi r^{2}$

1. Diameter is DOUBLE of radius, so the diameter must be divided by 2. 40/2 = 20.

2. Then, plug in the values into the area formula. A= 3.14 $(20^{2})$

3. Solve. A= 1256. (Remember that 20 squared is 20x20)

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Answer:

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Step-by-step explanation:

The missing choices are :

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2)One point on the line is (40, 10)

3)The slope of the line is 60

4)One point on the line is (10, 60)

Given the equation y−10=60(x−40), applying distributive property we get:

y−10=60x - 60*40

t = 60x - 2400 + 10

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To check if the point (40, 10) belongs to the equation, replace the values x = 40 and y = 10 in the equation, as follows:

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The same number appear at both sides of the equal sign, then the point (40, 10) is on the line. Analogously, for point (10, 60):

(60)−10=60((10)−40)

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50 = -1800

The two numbers are different, then, the point (10, 60) is not on the line.

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