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VashaNatasha [74]
3 years ago
7

I'm sry pls help! im bad at math:(((​

Mathematics
1 answer:
Basile [38]3 years ago
5 0
Choice B: I’m good a math and

STEP BY Step EXPLAINATION: 45 is double 25 and if you double 3.49=6.98 and choise B shows 4.79 soooo it’s choise B boooom.

Pls mark me Brainlyist
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Solve the equation <br> 19u-18+1.5u=8.25<br> A) u=0.25 <br> B) u=0.75<br> C) u=1.1<br> D) u=2.5
Nina [5.8K]

Answer:

its is 2.5

Step-by-step explanation:


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3 years ago
Bab in need of help!
katrin [286]

Answer:

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Step-by-step explanation:

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2 years ago
When the velocity v of an object is very​ large, the magnitude of the force due to air resistance is proportional to v squared w
Sati [7]

Answer:

Step-by-step explanation:

The model fo the shell is given by the following equation of equilibrium:

\Sigma F = -b\cdot v^{2} - m\cdot g = m\cdot \frac{dv}{dt}

This first-order differential equation has separable variables, which are cleared herein:

\int\limits^t_{0\,s} \, dt = -\frac{m}{b} \int\limits^{0\,\frac{m}{s} }_{600\,\frac{m}{s} } {\frac{1}{ v^{2}+\frac{m}{b}\cdot g } } \, dv

The solution of this integral is:

t = -\frac{m}{2b}\cdot \left[\tan^{-1} \left(\frac{v}{\sqrt{\frac{m\cdot g}{b} } }\right) - \tan^{-1} \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }\right)\right]

\tan^{-1} \left(\frac{v}{\sqrt{\frac{m\cdot g}{b} } }  \right)=-\frac{2\cdot b\cdot t}{m} + \tan^{-1}\left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)

\frac{v}{\sqrt{\frac{m\cdot g}{b} } }=\tan \left[-\frac{2\cdot b\cdot t}{m} + \tan^{-1}\left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)\right]

v = \sqrt{\frac{m\cdot g}{b} } \left [\frac{\tan \left(-\frac{2\cdot b \cdot t}{m}  \right)+ \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)}{1 - \left(\frac{600}{\sqrt{\frac{m\cdot g}{b} } }  \right)\cdot \tan \left(-\frac{2\cdot b \cdot t}{m}  \right) }\right]

4 0
3 years ago
Which side lengths form a right triangle?
saw5 [17]
B
because
{1}^{2} + {8}^{2} = {( \sqrt{65}) }^{2}
8 0
2 years ago
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Decide which measurement is greater. Place the correct symbol ( &lt;, &gt;, =) on the line between the measurements.
laila [671]

Answer:

5>18 and 25

1 and 4>32

3<8

13<4

4<9

i hope this helped :)

Step-by-step explanation:

5 0
2 years ago
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