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3 years ago

Pls help dont care about the blue dot btw

Mathematics

2 answers:

alexdok [17]3 years ago

7 0

Answer:

the answer is B

Step-by-step explanation:

ohaa [14]3 years ago

7 0

I believe it is A, This period witnessed the rise of suburbs and a growing middle class. Communitarianism and measurable social capital was at its highest point during this time.

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Matrix Multiplication

dezoksy [38]

Answer:

10 1

Step-by-step explanation:

5 0

3 years ago

Element X decays radioactively with a half life of 8 minutes. If there are 980 grams of Element X, how long, to the nearest tent

Marysya12 [62]

Answer:

$t \approx 36.1\,min$

Step-by-step explanation:

The time constant for the isotope decay is:

$\tau = \frac{8\min}{\ln 2}$

$\tau \approx 11.542\,min$

Now, the decay of the isotope is modelled after the following expression:

$m (t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

The time is now cleared with some algebraic handling:

$\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }$

$t = -\tau \cdot \ln \frac{m(t)}{m_{o}}$

Finally, the time need for the element X to decay to 43 grams is:

$t = - (11.542\,min)\cdot \ln\left(\frac{43\,g}{980\,g} \right)$

$t \approx 36.1\,min$

3 0

3 years ago

In this figure, AB¯¯¯¯¯∥CD¯¯¯¯¯ and m∠4=30°.

FrozenT [24]

Answer:

m∠8 = 30°

Step-by-step explanation:

Since line AB is parallel to line CD, and m∠4 = 30°, therefore:

m∠4 and m∠8 are corresponding angles.corewslinding angles are congruent.

Therefore, this means that their measure would be equal to each other, since they are congruent.

Thus:

m∠8 = 30°

6 0

3 years ago

Help me about this integral

NemiM [27]

The gradient theorem applies here, because we can find a scalar function f for which ∇ f (or the gradient of f ) is equal to the underlying vector field:

$\nabla f(x,y,z)=\langle2xy,x^2-z^2,-2yz\rangle$