3 years ago

Round 15 and 31 over 40 to the nearest whole

Mathematics

1 answer:

Ludmilka [50]3 years ago

3 0

Answer:

30 9/10

Step-by-step explanation:

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Factor out the GCF for 21x^3y^2 - 7x^2y + 42xy

Phantasy [73]

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4 years ago

Middle school math please help, thank you!

kipiarov [429]

Answer:

Step-by-step explanation:

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3 years ago

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padilas [110]

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4 years ago

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write the equation x^2 + 4y^2 - 6x - 7=0 in the standard form. state whether the graph is a parabola, circle, ellipse, or hyperb

Verizon [17]

X^2 + 4y^2 - 6x = 7

x^2 - 6x + 9 + 4y^2 = 16

(x-3)^2/16 + y^2/4 = 1

The graph is an ellipse

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8 0

3 years ago

how many spherical pellets of diameter 4 cm can be made out of a cube of lead for which each edge measures 27 cm ? round the ans

Harlamova29_29 [7]

Step-by-step explanation:

A lead cube of side $27\text{ cm}$ is used to make spherical pellets of diameter $4\text{ cm}$ .

As the volume of lead is conserved, the volume of raw material equals the volume of finished products.

$\text{Volume of cube} = \text{Volume of spheres produced}$

Let us assume that $n$ cubes are produced. Volume of a cube of side $s$ is $s^{3}$ . The volume of a sphere of diameter $d$ is $\dfrac{\pi d^{3}}{6}$ .

$(27\text{ cm})^{3}=n\times (\dfrac{\pi (4 cm)^{3}}{6} )\\\\19683\text{ cm}^{3}=n\times (\dfrac{32\pi \text{ cm}^{3}}{3} )\\\\n=587.37$

n is rounded off to 587.

∴ 587 spherical pellets can be made.

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4 years ago