3^4 = 3 * 3 * 3 * 3 = 81
<span>2 ⋅ 5 = 10
81 + 10 = 91
The answer is 91.</span>
Answer:
For 0° ≤ x ≤ 360° we have:
x=0, 360, arccos(1/6), -arccos(1/6)
Step-by-step explanation:
Replace cos(x) by y
6y²-7y+1=0
6y²-6y-y+1=0
6y(y-1) -(y-1)=0
(y-1)(6y-1)=0
Roots:
y=1, cos(x)=1, x=0 and 360
y=1/6, cos(x)=1/6, x=arccos(1/6) and x=-arccos(1/6)
<span>------------------------------------
</span>Find Radius
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Radius = Diameter ÷ 2
Radius = 27 ÷ 2
Radius = 13.5 cm
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Find Area
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Area of circle x = πr²
Area of circle x = 3.14 x 13.5²
Area of circle x = 572.265 cm²
------------------------------------
Find Radius
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Radius = Diameter ÷ 2
Radius = 12 ÷ 2
Radius = 6 cm
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Find Area
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Area of circle y = πr²
Area of circle y = 3.14 x 6²
Area of circle y = 113.04 cm²
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Compare the area
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572.265 - 113.04 = 459.23 cm²
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Answer: Circle x is 459.23cm² greater than circle y.
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