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ZanzabumX [31]
2 years ago
9

A circle with radius of 9 cm sits inside a circle with radius of 11

Mathematics
1 answer:
saul85 [17]2 years ago
8 0
Ok so to answer this, we first need to figure out the area of both circles
we will use the formula A=πr²

so our two areas end up being 121π and 81π

now all we do is subtract the smaller from the larger

121π - 81π = 40π

shaded region = 40π
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Regular quadrilateral prism has an altitude h = 11 cm and base edges b=8 cm. Find the sum of all edges.
maxonik [38]
The sum of all edges is 108 cm.

There are two bases whose edges are all 8 cm; this gives us 8(4)+8(4) = 32+32=64.

There are 4 edges between bases that are 11 cm each; 11(4) = 44

Together, this gives us 64+44=108 cm.
7 0
3 years ago
A circle has a circumference of 7,850 units. What is the radius of the circle
Snezhnost [94]

Answer: Radius = 1,250

Step-by-step explanation: The circumference of a circle equals the 2 x radius x π.

The formula to solve the radius is 2r x 3.14 = 7,850

Divide both sides by 3.14 = 2r = 2,500

Divide both sides by 2 = r = 1,250.

The radius = 1,250

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3 years ago
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3 years ago
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5 0
2 years ago
Katie earned $1890 in 7 years on an investment at a 6% annual simple interest rate.
n200080 [17]

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Read 2 more answers
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