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3 years ago

PLEASE HELP IM SO STUCK 20 POINTS

Mathematics

1 answer:

prohojiy [21]3 years ago

5 0

Answer: X = 2

Step-by-step explanation: The correct answer to this question is that x=2. Regardless of what point you go to on the line, it always has a value of 2 because it is going vertically (up and down) at 2.

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Six students in Mrs. Lola’s class like strawberry pie; this represents 30% of the total class.

natta225 [31]

Answer: Total class = 20 students

Step-by-step explanation: 30/6 = 5, which means that 1 student would make up 5 percent of the class.

100/5 = 20, which represents the total amount of students in that classroom because 5*20 is 100 and 5 percent represents 1 person of the class

6 0

3 years ago

What is 2/300 as a decimal?

Butoxors [25]

Divide 2 by 300. 0.0066666667

7 0

2 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

2 years ago

How many miles did a plane travel if it flew 455 miles per hour in 3 hours and what formula did you have to use

Kitty [74]

Answer:

It flew 1,365 miles

Step-by-step explanation:

Just multiply the speed in mph by the time in hours so 455 * 3

4 0

3 years ago

A square rug has an area 36 ft squared. Write the side length as a square root. Then decide if the side length is a rational num

Masja [62]

Answer:

Side length = 6 ft

Step-by-step explanation:

Each side is 6 ft

6 x6 = 36 square feet

6 0

1 year ago

Read 2 more answers