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3 years ago

15

Madisyn spent $200 at a thrift shop. She bought 2 rings for $24 each. She spent the rest on 4 equally priced bracelets. How much

did each bracelet cost

1 answer:

dimaraw [331]3 years ago

6 0

Answer: $43.32 each

Step-by-step explanation:

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First come first served brainiest:)

inessss [21]

Anserve

Step-by-step explanation:

3 0

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

How do you write the number 3 2/4 as a fraction greater than 1

tatyana61 [14]

14/4 > 1 is what it looks like.

8 0

3 years ago

A ladder leans against a building that angle of elevation of the latter is 70° the top of the ladder is 25 feet from the ground.

VashaNatasha [74]

Answer:

a. 20.5

Step-by-step explanation:

because this will form a right triangle we can use tan (opposite over adjacent) so an equation we could set up would be tan(70)=25/x

therefore we can just solve the equation which would give us 20.45. so if we round it the answer would be a

3 0

3 years ago

Read 2 more answers

Match the verbal description to the correct expression.

dusya [7]

Answer:

1. n + 34

2. n - 34

3. n × 34

Step-by-step explanation:

1. 34 more than a number n + 34

2. a number decreased by 34 n - 34

3. the product of a number and 34 n × 34

6 0

3 years ago