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avanturin [10]
2 years ago
5

1. Sarah went to dinner, and the bill was $15.25. She left a 15% tip. How

Mathematics
2 answers:
crimeas [40]2 years ago
7 0

$17.54 is the answer I think

mestny [16]2 years ago
3 0

Answer:

$17.54

Step-by-step explanation:

15% percent of $15.25 is $2.29 so, add them together

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The base of a solid in the region bounded by the two parabolas y2 = 8x and x2 = 8y. Cross sections of the solid perpendicular to
Usimov [2.4K]

The two curves intersect at two points, (0, 0) and (8, 8):

x^2=8y\implies y=\dfrac{x^2}8

y^2=\dfrac{x^4}{64}=8x\implies\dfrac{x^4}{64}-8x=0\implies\dfrac{x(x-8)(x^2+8x+64)}{64}=0

\implies x=0,x=8\implies y=0,y=8

The area of a semicircle with diameter d is \dfrac{\pi d^2}8. The diameter of each cross-section is determined by the vertical distance between the two curves for any given value of x between 0 and 8. Over this interval, y^2=8x\implies y=\sqrt{8x} and \sqrt{8x}>\dfrac{x^2}8, so the volume of this solid is given by the integral

\displaystyle\frac\pi8\int_0^8\left(\sqrt{8x}-\dfrac{x^2}8\right)^2\,\mathrm dx=\frac{288\pi}{35}

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3 years ago
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Oliga [24]

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Step-by-step explanation:

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2 years ago
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