Answers
Related Questions
The price of a pair of shoes increases from $55 to $63. What is the percent increase to the nearest percent?
View
The percent increase is
Answers
Answer:
3%
Step-by-step explanation:
Some atomic processes can result in the emission of an electron from the atom. Electrons emitted in this way can have discrete values of kinetic energy, which depend on the atomic energy levels. The probability that the electron has a particular value depends on interacions within the atom. Suppose a particular atomic process results in three values of the electron kinetic energy: Ψ1 has Ee = 10 eV, with probability 0.2. Ψ2 has Ee = 16 eV, with probability 0.3. Ψ3 has Ee = 34 eV, with probability 0.5. The electron's wave function can be written as a quantum superposition: Ψ = aΨ1 + bΨ2 + cΨ3 What are the magnitudes of a, b, and c?
Answers
Answer:
|a| = 0.447
|b| = 0.547
|c| = 0.707
Step-by-step explanation:
From available data
Ψ1 = Ee = 10eV probability = 0.2
Ψ2 = Ee = 16eV, probability = 0.3
Ψ3 = Ee = 34eV, probability = 0.5
The magnitude of a
= a² = 0.2
= a = √0.2
|a| = 0.447
The magnitude of b
b² = 0.3
b = √0.3
|b| = 0.547
The magnitude of c
c² = 0.5
c = √0.5
|c| = 0.707
So in conclusion we have magnitude of a = 0.447
b = 0.547
c = 0.707
The magnitude of a , b and c are [tex]0.447, 0.547[/tex] and [tex]0.707[/tex] respectively.
Electron kinetic energy :The electron's wave function is given as,
[tex]\psi=a\psi _{1}+b \psi _{2}+c\psi _ {3}[/tex]
three values of the electron kinetic energy is given as,
[tex]\psi _{1}[/tex] has E = 10 eV, with probability 0.2
[tex]\psi _{2}[/tex] has E = 16 eV, with probability 0.3.
[tex]\psi _{3}[/tex] has E= 34 eV, with probability 0.5.
The value of a, b and c shown below,
[tex]a^{2}=0.2\\ \\a=\sqrt{0.2}=0.447\\ \\b=\sqrt{0.3}=0.547\\ \\c=\sqrt{0.5}=0.707[/tex]
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Simplify. *
[3+ (9 – 6)] [52 – 3:5((42 – 2 · 8))]
Answers
(6)[52-(3/5)(26)]
(6)(52-15.6)
36.4(6)
218.4
if this is wrong im so sorry
PLEASEEE ANSWERRRRRRRRRRRRR
Construct a line through P that is parallel to given line by following these steps.
1. Construct a line though points Q and P
Answers
Answer:
its a triangle 1stQ 2ndP 3rdN
Step-by-step explanation:
If an inequality uses the phrase at most, it will require a greater than symbol
True
False
Answers
Mary drilled a hole that is 5/8 inch wide. She has a screw that is 5/6 inch wide. Is the hole wide enough to fit the screw? Explain by comparing the two fractions.
Answers
Answer:
nope the screw can't fit in the hole.
Step-by-step explanation:
because 8 is smaller than 6, the pieces of 6 are bigger. If both of the rectangles have 5 pieces colored in, that the screw is bigger that the hole
(9-3) -6+(-102
Help me
Answers
Answer: -102
Step-by-step explanation: First we do 9-3 = 6, then add -6 which cancels each other out, so all we have left is -102.
Hope this helps! :)
Answer:
-102
Step-by-step explanation:
(+9) - (+3) = +6
(-6) = -6
+ (-102) = -102
so, +6 -6 -102 = -102
WHAT IS 50 DIVIDED BY 32 RESONG FAST PLEASE
Answers
Answer:
1.5625
Step-by-step explanation:
the answer is 1.5625
THIS IS URGENT. The table above shows the number of students that prefer a particular type of pizza. If there are 25 students
in the class, what percent of students prefer a 4-Cheese pizza?
Answers
Answer:
40%
Step-by-step explanation:
Answer:
32%
Step-by-step explanation:
8 of 25=32%
Which equation represents a line that passes through (4, 5) and has a slope of ?
Oy--(-4)
Oy-- (-4)
Oy- } = 4(x-)
Oy- 4 = (x - 1)
Answers
Answer:
B
Step-by-step explanation:
Since we are given a point and the slope, we can use the point-slope form. Point-slope form is given by:
[tex]y-y_1=m(x-x_1)[/tex]
Where (x₁, y₁) is a point and m is our slope.
Let's let our point (4, 1/3) be (x₁, y₁) respectively.
We also know that our slope is 3/4. So, we will substitute 3/4 for m.
This yields:
[tex]\displaystyle y-\frac{1}{3}=\frac{3}{4}(x-4)[/tex]
The choice that represents this is B.
So, our correct answer is B.
And we're done!
[tex]y - \frac{1}{3} = \frac{3}{4} (x - 4)[/tex]
Step-by-step explanation:Given the line passes through (4, 1/3) and it's slope is 3/4
[tex]y = mx + c[/tex]
[tex]slope = m[/tex]
[tex]m = \frac{3}{4} [/tex]
[tex]y = \frac{3}{4} x + c[/tex]
At (4, 1/3)
[tex] \frac{1}{3} = \frac{3}{4} (4) + c[/tex]
[tex]c = - \frac{8}{3} [/tex]
[tex]y - intercept = - \frac{8}{3} [/tex]
The equation of the line:
[tex]y = \frac{3}{4} x - \frac{8}{3} [/tex]
The answer is:
[tex]y - \frac{1}{3} = \frac{3}{4} (x - 4)[/tex]
*if you expand the equation above you will get the equation of line you initially got*
Which of the following represents a true statement?
A. 19^21 x 19^3 = 19^63
B. (24^8)^5 = 24^40
C. 20^1 x 20^0 = 20^0
D. 16^40 / 16^20 = 16^2
(LOOK AT THE PICTURE PLEASE)
Answers
When you raise an exponential expression to another exponent, you multiply the exponents. We have 8*5 = 40 as the final exponent. The rule is (x^y)^z = x^(y*z). The base stays the same.
Statement A is not true because we should be adding the exponents. The rule is x^y*x^z = x^(y+z). Note how the bases are all the same. We'll use this rule for statement C to show that it is also false.
A similar rule is (x^y)/(x^z) = x^(y-z). We subtract the exponents this time. This rule is used to show that statement D is false.
Given that the center of a circle is C(-10,-7) and the point S(4,4) lies on the circle's edge calculate the circle's radius to two decimal places
Answers
Answer:
[tex]r\approx 17.80[/tex]
Step-by-step explanation:
Equation of the Circle
A circle can be completely defined knowing its center and radius. The radius is the distance from the center to any point in its edge. Since we know the center of the circle is (-10,-7) and one point in its edge is (4,4), we calculate the distance between those points:
[tex]r=\sqrt{(4-(-10))^2+(4-(-7))^2}[/tex]
[tex]r=\sqrt{14^2+11^2}[/tex]
[tex]r=\sqrt{196+121}=\sqrt{317}[/tex]
[tex]\boxed{r\approx 17.80}[/tex]
Perpendicular lines are
lines that never intersect.
lines that intersect at one point
lines that intersect at 90* angle
two angles whose measure have a sum of 90*
Answers
Approximately 8% of all people have blue eyes. Out of a sample of 20 people what is the probability that 2 of them have blue eyes
Answers
Answer: 10%
Step-by-step explanation:
2/20
the mean lifespan is 71.45 years, and the standard deviation is 12.35 years. Mr. Rodriguez would like to know how many days, on average, presidents tend to live beyond their 70th birthday. Find the mean and standard deviation of the transformed data. Note: There are 365 days in a year.
Answers
Answer:
Standard deviation, ∂ = 64.21 days
Mean = 429.21 days
Step-by-step explanation:
Given:
Mean lifespan = 71.45 years
Standard deviation = 12.35 years
Standard deviation, ∂ = x - µ / N
Where,
∂ = standard deviation
µ = mean life span
x = size of year
x = 70 years
Standard deviation, ∂ = x - µ / N
= 70 - (71.45 / 12.35)
= 70 - 5.79
= 64.21
Standard deviation, ∂ = 64.21 days
Mean = ∑x + standard deviation
∑x = 365
Mean = ∑x + standard deviation
= 365 + 64.21
= 429.21 days
Mean = 429.21 days
The perimeter of a rectangle is 38 feet. The length is four more than twice the width.
Find dimensions plz
Answers
Answer:
length=14 width=5
Step-by-step explanation:
since the length is 4 more then subtract 4*2=8 which would equal 30 divide that by two since a rectangle has 4 sides two of which are the same,
than divide it by the getting 5 which is the width.
subtract 5*2=10 from 38 which would = 28
28divided by 2 is the length which is 14
Answer:
The answer are
Width=5ft
Length=14ft
Step-by-step explanation:
P=2(L+B)
P/2=2(L+B)/2
P/2=L+B
L=4+2W
38/2=4+2W+W
19=4+3W
3W=19-4
3W=15
divide both sides by 3
3W/3=15/3
W=5ft
L=4+2W
L=4+2(5)
L=4+10
L=14ft
Identify the constant of proportionality in the
following graphs:
Plz help
Answers
Answer:
its proportionality
Step-by-step explanation:
What is the simplified expression for the expression below? 4(x + 8) + 5(x - 3) 09x + 5 O 9x + 11 09x + 17 o 9x + 47
Answers
Answer:
[tex]45x^2+198xo+978x+79[/tex]
Step-by-step explanation:
I start my grouping the like terms.[tex]=45x^2+45xo+153xo+4x-135x+1109x+32+47[/tex]
Then, I add the similar elements.
[tex]4x-135x+1109x=978x[/tex]
[tex]=45x^2+198xo+978x+32+47[/tex]
Finally, I added the numbers up.
[tex]=45x^2+198xo+978x+79[/tex]
A certain bacteria doubles in number every hour. If there are 5 bacteria
in a petri dish now, how many will there be in 10 hours?
Answers
5 bacteria will become 10 in 1 hour
As it’s 10 hours
10 x 10 = 100
Sounded like a easy question I got so confused lol
Hope this Helps :)
PLS HELP ME!!
What is the difference between a rotation and a reflection?
What does it mean for two figures to be congruent?
Travis performs a dilation of ⅓ on a polygon. He then classifies the image and pre-image as being congruent. Is Travis correct? Why or why not?
What does it mean for angles to be adjacent?
If angle X has a measure of 40 degrees and angle Y is vertical to angle X, what is the measure of angle Y?
Triangle ABC has two known angles. Angle A measures 55 degrees. Angle B measures 30 degrees. What is the measure of angle C?
Answers
Answer:
rotation spins the shape around the origin while a reflection mirrors it across an axis. Two congruent figures are two figures that are Identical but in different locations. Travis is incorrect because when Travis changes the size he changes the shapes from being congruent to being similar. Adjacent angles are angles that share a wall and a vertex. The measure of angle y is 40 degrees. The measure of angle C is 95 degrees.
Step-by-step explanation:
Find the circumference and the area of a circle with radius 3 ft.
Use the value 3.14 for it, and do not round your answers. Be sure to include the correct units in your answers
Answers
Circumference = 2 x radius x Pi
= 2 x 3 x 3.14
= 6 x 3.14
= 18.84 feet
Area = pi x r ^2
= 3.14 x 3^2
= 3.14 x 9
= 28.26 square feet
The circumference of the circle will be C= 18.84 ft and the area of the circle will be [tex]A=28.27 ft^2[/tex]
What is area of the circle?The area of the circle is defined as the quantity of the space covered by the circle in a two-dimensional plane.
It is given in the question ;
Radius of the circle = 3 ft.
The area of the circle is given by the formula;
[tex]A=\pi r^2[/tex]
[tex]A=\pi \times 3\times 3[/tex]
[tex]A= 28.27\ Ft ^2[/tex]
Circumference of the circle is given by
[tex]C=2\pi r[/tex]
[tex]C=2\pi\times 3[/tex]
[tex]C=18.84\ Ft[/tex]
Hence the circumference of the circle will be C= 18.84 ft and the area of the circle will be [tex]A=28.27 ft^2[/tex]
To know more about Circle follow
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Which statements about the diagram are true?
A
M
w
N
S
7
K
a
Cis coplanar with plane YDU.
plane KCW and plane CHK intersect at K.
b
ud
CD and CN
CN intersect at
Nis coplanar with plane YDU.
Answers
2.6x10^2+3.9x10^11 what is this
Answers
Answer:
10 · 13 (2 + 3 · [tex]10^{9}[/tex] w)
Step-by-step explanation:
hope this helps!!!
.. help. ...................
Answers
Answer:
10
Step-by-step explanation:
Mrs. Cook is a teacher whose salary is $23,125 for a 185-day school year. In Mrs. Cook's school district, substitute teachers are paid at a rate of $90 per day. If a substitute is paid to teach Mrs. Cook's class in her absence one day, how much less does the school district pay in salary by paying a substitute teacher instead of paying Mrs. Cook for that day? *
Answers
Answer:
35
Step-by-step explanation:
23,125/185= 125
125-90 = 35
$35 less amount school district pay in salary by paying a substitute teacher instead of paying Mrs. Cook for that day
What is unitary Method?The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.
For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.
12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.
As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.
This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.
Given:
Mrs. Cook is a teacher whose salary is $23,125 for a 185-day school year.
Mrs. Cook per day salary= 23125/ 185 = $125
Now, substitute teachers are paid at a rate of $90 per day.
So, if substitute teachers take class instead of Mrs. Cook, then school will pay
= 125-90
=$35 less amount.
Learn more about unitary method here:
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What is the absolute value of -8? Use the number line to help answer the question.
✓x
8
-7 -6
-S
4
-3
-2
L1
1
2.
3
4
S
3
8
-16
-8
8
16
Answers
Answer:
is 8
Step-by-step explanation:
At 2 hours before sunset, the temperature is 0°F. At 2 hours after sunset, the temperature is −4°F. Identify the slope, y-intercept, x-intercept, and equation that represents the temperature, y, as it changes over time, x.
Answers
Answer:
[tex]Slope = -1[/tex]
[tex]y = -2[/tex] --- y intercept
[tex]x = -2[/tex] ---- x intercept
[tex]y = -x - 2[/tex] --- equation
Step-by-step explanation:
Given
Represent temperature with y and time with x
When
[tex]y = 0F; x = 2hrs\ before\ sunsets[/tex]
[tex]y = -4F; x = 2hrs\ after\ sunset[/tex]
Solving Slope;
[tex]Slope = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]Slope = \frac{-4 - 0}{2 - (-2)}[/tex]
[tex]Slope = \frac{-4 - 0}{2 +2}[/tex]
[tex]Slope = \frac{-4}{4}[/tex]
[tex]Slope = -1[/tex]
Using
[tex]Slope = \frac{y - y_1}{x - x_1}[/tex], we can get the equation
Where
[tex]Slope = -1[/tex]
[tex]x_1 = -2[/tex]
[tex]y_1 = 0[/tex]
This gives:
[tex]-1 = \frac{y - 0}{x -(-2)}[/tex]
[tex]-1 = \frac{y}{x +2}[/tex]
Cross multiply
[tex]y = -x - 2[/tex]
Take x as 0; to solve the y intercept
[tex]y = -0 - 2[/tex]
[tex]y = -2[/tex]
Take y as 0; to solve the x intercept
[tex]0 = -x -2[/tex]
[tex]x = -2[/tex]
Answer:Answer:
--- y intercept
---- x intercept
--- equation
Step-by-step explanation:
Given
Represent temperature with y and time with x
When
Solving Slope;
Using
, we can get the equation
Where
This gives:
Cross multiply
Take x as 0; to solve the y intercept
Take y as 0; to solve the x intercept
Step-by-step explanation:
Suppose you measured the diameter of a tree trunk to be 5 cm. The actual diameter can vary by at most 0.4 cm, due to the error in measuring a non-flat surface. Write an absolute value inequality for the range of acceptable diameters and solve the inequality.
Answers
Answer:
|d − 0.4| ≤ 5; −4.6 ≤ d ≤ 5.4
Step-by-step explanation:
sin(A+B) - sin(A-B) = 2cos A sin B
Prove that answer please , I'm stuck
Answers
Answer:
Step-by-step explanation:
Hello,
I assume that you know that
[tex]sin(A+B)=sinAcosB+cosAsinB\\\\sin(A-B)=sinAcosB-cosAsinB[/tex]
One way to retrieve them quickly is to use Euler's formula and then,
[tex]cos(A+B)+isin(A+B)=e^{i(A+B)}=e^{iA}e^{iB}=(cosA+isinA)(cosB+isinB)[/tex]
and you can replace B by -B for the second formula.
So, it comes that sin(A+B)-sin(A-B)=2cosAsinB
Hope this helps
The sequence -4,-6,-8,-10 has a constant ratio or difference of
Answers
Answer:
2
Step-by-step explanation:
We can subtract to find the common difference.
-4 - (-6) = 2
-6 - (-8) = 2
-8 - (-10) = 2
As you can see it is constant.
Best of Luck!
