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2 years ago

Calculate the area of a circle with a diameter of 8cm. Show all your work.

Mathematics

2 answers:

vesna_86 [32]2 years ago

7 0

A≈50.27cm²

Using the formulas

A=πr2

d=2r

Solving forA

A=1

4πd2=1

4·π·82≈50.26548cm²

Talja [164]2 years ago

4 0

Answer:

16π cm^2

Step-by-step explanation:

The formula for the area of a circle is $\pi r^{2}$ , r being the radius. The radius is always half of the diameter, so in this case, the radius is 4. $4^{2}$ is just 4 * 4 which is 16. Multiply that by π and you get 16π. Or, approximately 50.27 cm^2

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2 years ago

In a study investigating a link between walking and improved health, researchers reported that adults walked an average of 873

Rainbow [258]

Answer:

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Step-by-step explanation:

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2 years ago

A certain bean plant grows 15% of its height each day today after 10 days the bean plant is 27 inches tall how tall was it yeste

frez [133]

Given:
15% of its height each day
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The plant was 23.48 inches tall yesterday.

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3 years ago

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Marta_Voda [28]

Answer:

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Step-by-step explanation:

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8 0

2 years ago

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Solve the system using substitution. Show all work. (3 points)<br> y=-2x+6<br> 3y-x+3=0

svp [43]

Y = -2x + 6....so we sub in -2x + 6 for y in the other equation

3y - x + 3 = 0
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-6x + 18 - x + 3 = 0
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-7x = -21
x = -21/-7
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now we sub 3 in for x in either of the original equations to find y.
y = -2x + 6
y = -2(3) + 6
y = -6 + 6
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so ur solution is : (3,0)

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2 years ago

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