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4 years ago

HELP PLEASE!!!Area of the base=

Mathematics

1 answer:

HACTEHA [7]4 years ago

5 0

Answer:

the answer is c

Step-by-step explanation:

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What is a word problem that equals 12!! please hurry

tekilochka [14]

You have 24 apples and you get rid of 12. How many do you have left?

24-12=x

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3 years ago

G find the area of the surface over the given region. use a computer algebra system to verify your results. the sphere r(u,v) =

Svetach [21]

Presumably you should be doing this using calculus methods, namely computing the surface integral along $\mathbf r(u,v)$ .

But since $\mathbf r(u,v)$ describes a sphere, we can simply recall that the surface area of a sphere of radius $a$ is $4\pi a^2$ .

In calculus terms, we would first find an expression for the surface element, which is given by

$\displaystyle\iint_S\mathrm dS=\iint_S\left\|\frac{\partial\mathbf r}{\partial u}\times\frac{\partial\mathbf r}{\partial v}\right\|\,\mathrm du\,\mathrm dv$

$\dfrac{\partial\mathbf r}{\partial u}=a\cos u\cos v\,\mathbf i+a\cos u\sin v\,\mathbf j-a\sin u\,\mathbf k$
$\dfrac{\partial\mathbf r}{\partial v}=-a\sin u\sin v\,\mathbf i+a\sin u\cos v\,\mathbf j$
$\implies\dfrac{\partial\mathbf r}{\partial u}\times\dfrac{\partial\mathbf r}{\partial v}=a^2\sin^2u\cos v\,\mathbf i+a^2\sin^2u\sin v\,\mathbf j+a^2\sin u\cos u\,\mathbf k$
$\implies\left\|\dfrac{\partial\mathbf r}{\partial u}\times\dfrac{\partial\mathbf r}{\partial v}\right\|=a^2\sin u$

So the area of the surface is

$\displaystyle\iint_S\mathrm dS=\int_{u=0}^{u=\pi}\int_{v=0}^{v=2\pi}a^2\sin u\,\mathrm dv\,\mathrm du=2\pi a^2\int_{u=0}^{u=\pi}\sin u$
$=-2\pi a^2(\cos\pi-\cos 0)$
$=-2\pi a^2(-1-1)$
$=4\pi a^2$

as expected.

6 0

3 years ago

Betty used two types of chocolate chips in her cookie recipe. For every 7 milk chocolate chips she uses, she also use 3 dark cho

emmainna [20.7K]

When you have 3 for every 7, you divide
450 divided by 3
150

7 0

4 years ago

PLEASE ANSWER FAST!!!

NemiM [27]

Answer:

A- 3,000 = 50(60) + b

B- 2,100 = 50(42) + b

Step-by-step explanation:

i just did it

4 0

4 years ago

Read 2 more answers

Find the product (3x-9)^2

Stells [14]

Here are the steps:

(3x-9)^2

(3x-9)(3x-9)

9x^2 - 27x - 27x +81

9x^2 - 54x + 81

good luck ;)

4 0

3 years ago