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3 years ago

Choose the most convenient method to graph the line 2x+5y=−10.

Mathematics

1 answer:

Serjik [45]3 years ago

6 0

Answer:

graph the line using the slope and y-intercept or two points

slope:-2/5

y-intercept:(0,-2)

x | y

-5 | 0

0 | -2

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A rectangle is 12.5 m wide and 18.24 m long.

ICE Princess25 [194]

The correct answer is 228.00 m2

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3 years ago

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A certain semiconductor device requires a tunneling probability of T = 10-5 for an electron tunneling through a rectangular barr

Goryan [66]

Answer:

Generally the barrier width is $a = 1.9322 *10^{-9} \ m$

Step-by-step explanation:

From the question we are told that

The tunneling probability required is $T = 1 * 10^{-5}$

The barrier height is $V_o = 0.4 eV$

The electron energy is $E = 0.08eV$

Generally the wave number is mathematically represented as

$k = \sqrt{ \frac{2 * m [V_o - E]}{\= h^2} }$

Here m is the mass of the electron with the value $m = 9.11 *10^{-31} \ kg$

h is is know as h-bar and the value is $\= h = 1.054*10^{-34} \ J \cdot s$

$k = \sqrt{ \frac{2 * 9.11 *10^{-31 } [0.4 - 0.04] * 1.6*10^{-19}}{[1.054*10^{-34}^2]} }$

=> $k = 3.073582 *10^{9} \ m^{-1}$

Generally the tunneling probability is mathematically represented as

$T = 16 * \frac{E}{V_o } * [1 - \frac{E}{V_o} ] * e^{-2 * k * a}$

$1.0 *10^{-5} = 16 * \frac{0.04}{0.4 } * [1 - \frac{0.04}{0.4} ] * e^{-2 * 3.0736 *10^{9} * a}$

=> $6.944*10^{-6}= e^{-2 * 3.0736 *10^{9} * a}$

Taking natural log of both sides

$ln[6.944*10^{-6}] = -2 * 3.0736 *10^{9} * a}$

=> $-11.8776 = -2 * 3.0736 *10^{9} * a}$

=> $a = 1.9322 *10^{-9} \ m$

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3 years ago

Explain how to write an equation from a graph in slope intercept form .

lys-0071 [83]

Step-by-step explanation:

To write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. This is the value of m in the equation. Next, find the coordinates of the y-intercept--this should be of the form (0, b). The y- coordinate is the value of b in the equation.

pls give brainest i only have 2

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3 years ago

Multiple Choice

riadik2000 [5.3K]

The answer is 1954. Letter C is correct
Solution:
If P(x) = <span>165,000
</span>Then
165,000 = 55,000(x - 1945<span>)^(1/2)
x= 1954

to check it, substitute x
</span>165,000 = 55,000(1954 - 1945)^(1/2)
165,000 =165,000

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3 years ago

Help :C The question is the picture !

hjlf

Answer:

Step-by-step explanation:

28/4=7

5x7=35

so the missing value is 35

Hope i helped have a great day ( or night )!

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2 years ago

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