Emma put $35,000 in an education

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

6 0

A = ( 1 +r/n)^nth
or something, use .0585

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Family bought 12 oranges from the market. However, one-fourth of these oranges were rotten. How many oranges were not rotten?

sashaice [31]

Answer:

1/4 of them were rotten

rotten ones = 1/4 × 12 = 3

ones that weren't rotten = 12 - 3 = 9

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2 years ago

vocabulary. use a vocabulary term to complete the definition ---------------are numbers that are easy to compute mentally

erma4kov [3.2K]

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3 years ago

Evaluate the integral by changing to polar coordinatesye^x dA, where R is in the first quadrant enclosed by the circle x^2+y^2=2

34kurt

$\displaystyle\iint_Rye^x\,\mathrm dA=\int_{\theta=0}^{\theta=\pi/2}\int_{r=0}^{r=5}r^2\sin\theta e^{r\cos\theta}\,\mathrm dr\,\mathrm d\theta$

which follows from the usual change of coordinates via

$\begin{cases}\mathbf x(r,\theta)=r\cos\theta\\\mathbf y(r,\theta)=r\sin\theta\end{cases}$

and Jacobian determinant

$|\det J|=\left|\begin{vmatrix}\mathbf x_r&\mathbf x_\theta\\\mathbf y_r&\mathbf y_\theta\end{vmatrix}\right|=|r|$

Swap the order, so that the integral is

$\displaystyle\int_{r=0}^{r=5}\int_{\theta=0}^{\theta=\pi/2}r^2\sin\theta e^{r\cos\theta}\,\mathrm d\theta\,\mathrm dr$

and now let $\sigma=r\cos\theta$ , so that $\mathrm d\sigma=-r\sin\theta$ . Now, you have

$\displaystyle\int_{r=0}^{r=5}\int_{\sigma=0}^{\sigma=r}re^\sigma\,\mathrm d\sigma\,\mathrm dr=\int_{r=0}^{r=5}r(e^r-1)\,\mathrm dr=4e^5-\dfrac{23}2$

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3 years ago

Can u help me plz I suck at math

NemiM [27]

Answer:

so its the second one (1.28 , -3.68)

Step-by-step explanation:

its (32/25 , -92/25)

which equals to (1.28,-3.68)

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3 years ago

Dobie works as a window washer, and finds lots of time to think while working. He notices when windows are cracked, and fells th

pshichka [43]

Ans is c because the b and a has to be sub and u get the ans as c

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2 years ago