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777dan777 [17]
4 years ago
12

Find the diameter of a circle with an area of 74 square millimeters

Mathematics
1 answer:
KatRina [158]4 years ago
7 0

Answer:

The diameter of the circle is 9.7mm

Step-by-step explanation:

The area of a circle is given by the following formula:

A_{c} = \pi r^{2}

In which r is the radius.

In this problem, we have that

A_{c} = 74 mm^{2}

So

74 = \pi r^{2}

r = \sqrt{\frac{74}{\pi}}

r = 4.85mm

The diameter is twice the radius:

So

d = 2r = 2*4.85 = 9.7

The diameter of the circle is 9.7mm

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What is -13 = v/10 - 12
Free_Kalibri [48]

Answer:

-10 =v

Step-by-step explanation:

-13 = v/10 - 12

Add 12 to each side

-13+12 = v/10 - 12+12

-1 = v/10

Multiply each side by 10

-1*10 = v/10 *10

-10 =v


6 0
4 years ago
Read 2 more answers
A square patio has an area of 200 square feet. How long is each side of the patio to the nearest tenth?
Jlenok [28]
Area (square)=side²
therefore:
side²=200 feet²
side=√(200 feet²)=14.142 feet≈14.1 feet.

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3 years ago
D. 10.83<br> Math question Please Help don't Guess
shepuryov [24]

Remark

You need to do some trig to get the final answer. There is no way around it. You can however, solve the first part with the Pythagorean Theorem.

Step One

Find AB

AB^2 = DB^2 + AD^2

AB^2 = 7.5^2 + 4.9^2

AB^2 = 56.25 + 24.01

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Step Two

Move to the triangle on your right. Find x

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