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3 years ago

The diameter of a circle is 4cm. Find it area to nearewt tenth.

Mathematics

2 answers:

DIA [1.3K]3 years ago

6 0

Answer:

12.6cm

Step-by-step explanation:

Natasha_Volkova [10]3 years ago

6 0

12.6 cm²

Area formula: (A = πr²)

If the diameter is 4 cm.. then that would mean the radius is 2 cm because the radius is half of the diameter. So, we already know the radius.. we just have to find the circumference.

Circumference formula: (C = πd) or (C = 2πr)

Finding the circumference : 3.14 × 4 = 12.56 cm

So, we now have the radius and circumference.

Radius = 2 cm

Circumference = 12.56 cm

Finding the Area : 3.14 × 2 × 2 = 12.56 cm²

So, 12.56 rounded to the nearest tenth is 12.6 cm².

Hope this helped! :)

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I'm really not sure how to go about solving this algebraic equation, please help! .513 = (2x)^2 / (.05-x)

LiRa [457]

Let's set it up like this:
$0.513=\frac{\left(2x\right)^2}{\left(0.05-x\right)}$
Multiply both sides by $0.05-x$
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We are then going to use the distributive property. Since we also know that the opposite of an number that is squared is the square root, we can also apply that. We would be left with something like this:
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The variable $x$ can be both positive or negative.
We have found successfully our answer.

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3 years ago

Kyle and his friends share some apple pie equally. Each person gets 7/5 of the pies. Which of the following shows a possible way

stiv31 [10]

Answer:

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Step-by-step explanation:

Given

Apple shared equally

Portion of each person = 7/5

Required

A possible way that shows how the pies were shared.

Given that 7/5 is the ration of the pie to each individual (Kyle and his friends).

Provided that each individual got equal ration....

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Hence, 7 apples were shared.

The denominator shows the number of people involved.

Hence, 5 people were involved.

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3 years ago

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Step-by-step explanation:

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Klio2033 [76]

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3 years ago

The diameter of a circle is 4cm. Find it area to nearewt tenth.​

The diameter of a circle is 4cm. Find it area to nearewt tenth.