2 years ago

What is the surface area of a sphere with radius 3?

1 answer:

7 0

The surface area is 113 but since that’s not an option I’m assuming you need the answer in terms of pi which would be 37

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Evaluate the following integral in cylindrical coordinates triple integral 1/(1+x^2+y^2) dzdxdy z=0..2 y=0..square root(1-x^2) x

sertanlavr [38]

In cylindrical coordinates, we take

$x=r\cos\theta$

$y=r\sin\theta$

$z=z$

so that $\mathrm dx\,\mathrm dy\,\mathrm dz=r\,\mathrm dr\,\mathrm d\theta\,\mathrm dz$ .

We have

$1+x^2+y^2=1+r^2$

and the integral is

$\displaystyle\int_0^2\int_0^\pi\int_0^1\frac r{1+r^2}\,\mathrm dr\,\mathrm d\theta\,\mathrm dz=\frac{\ln2}2\int_0^2\int_0^\pi\mathrm d\theta\,\mathrm dz=\boxed{\pi\ln2}$

8 0

3 years ago

What is the value of the expression (-8)(6) - (-4)(-5) + (-3)(-6)?

Vlad1618 [11]

-77 is the correct answer. Hope this helped. Comment if you would like a more detailed answer.

5 0

3 years ago

Its 94 i said it first tho so does that mean i get brainliest

Softa [21]

Answer:

YA if you said it first ya you are supposed to get brainlies ONLY if the question says will give brainliest if your right

Step-by-step explanation:

3 0

3 years ago

cylinder a has a radius of 1 m and a height of 4 m cylinder b has a radius of 1 m and a height of 8 what is the ratio of the vol

ikadub [295]

Volume of A= πR².H ==> V(A)=4π m³

Volume of V =πR².H ==>V(B)=8π m³

.Ratio of A to B =(4π) /(4π) = 1/2

8 0

3 years ago

Read 2 more answers

Thankyou for the help

ExtremeBDS [4]

Answer:

You would put C. 46

Step-by-step explanation:

99+35

since the total of the 3 numbers would be 180°. so 99°+ 35° = 134°

then you do 180°-134°=46, so 46° is your answer!

3 0

2 years ago