3 years ago

Help I don’t get these at all

Mathematics

1 answer:

uysha [10]3 years ago

5 0

Answer: its D. 24

Step-by-step explanation:

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Simplify the expression:<br><br> –5(6 − 2y) =

Vadim26 [7]

-30+10y
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3 0

3 years ago

Read 2 more answers

Round to the nearest...

skelet666 [1.2K]

15. 0.3478 becomes 0.3

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8 0

3 years ago

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