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Dahasolnce [82]
3 years ago
15

ABCD is a parallelogram which statements are true

Mathematics
2 answers:
Maru [420]3 years ago
7 0
I think ur right? I’m not sure tho.
Brilliant_brown [7]3 years ago
6 0
2nd one and 4th one are the correct answers



Tell me if I’m right or wrong
You might be interested in
Use cylindrical coordinates. find the volume of the solid that is enclosed by the cone z = x2 + y2 and the sphere x2 + y2 + z2 =
sashaice [31]
Let R be the solid. Then the volume is

\displaystyle\iiint_R\mathrm dV=\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr\,\mathrm d\theta

which follows from the facts that

\begin{cases}x=r\cos\theta\\y=r\sin\theta\\z=\zeta\end{cases}\implies\mathrm dx\,\mathrm dy\,\mathrm dz=r\,\mathrm dr\,\mathrm d\theta\,\mathrm d\zeta
(by computing the Jacobian)

and

z=x^2+y^2=r^2\implies z+z^2=72\implies z=-9\text{ or }z=8
(we take the positive solution, since it's clear that R lies above the x-y plane)
r^2+z^2=72\implies z=\pm\sqrt{72-r^2}
(again, taking the positive root for the same reason)
z=r^2\implies 8=r^2\implies r=\sqrt8

\displaystyle\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr\,\mathrm d\theta
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}r(\sqrt{72-r^2}-r^2)\,\mathrm dr
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}(r\sqrt{72-r^2}-r^3)\,\mathrm dr
=\dfrac{32(27\sqrt2-35)\pi}3
7 0
3 years ago
Orange juice is a common breakfast drink that contains citric acid. If the hydronium ion concentration is 3.4 × 10-4 in orange j
Lelu [443]

Answer:

3.5

Step-by-step explanation:

Given : the hydronium ion concentration is 3.4*10^{-4} in orange juice

To Find: what is the pH?

Solution :

Definition of pH : pH is the negative log of the molar hydrogen ion concentration

Formula of pH : - log [H+]

Since we are given H+ =  3.4*10^{-4}

So, substituting this value in formula :

pH = - log [3.4*10^{-4}]

pH = - log [3.4*0.0001]

pH = - log [0.00034]

pH = 3.468

pH = 3.468≈3.5

Thus the pH is 3.5

8 0
3 years ago
If you used 1 drop of your sample and 4 drops of diluent what is your dilution ratio?
frez [133]

Answer:

1/5

Step-by-step explanation:

1 + 4 = 5

1/5

7 0
3 years ago
Read 2 more answers
There is a proportional relationship between y and x. When x=2, y=-9.
suter [353]
They just told me to answer a bunch of questions sorry i dont know this best of luck tho !
8 0
3 years ago
Awnser this and show to Step By Step for this math ​
NikAS [45]

i cant understand the question

Sorry pls explain

3 0
3 years ago
Read 2 more answers
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