Periods are the rows that span the periodic table. Families or groups are the columns that go from Page 2 up.
How many different energy levels are there?The maximal energy level of the electrons serves as a marker for the period (or row) in the periodic table that an atom belongs to (1 through 7). The table has 7 periods, hence there are 7 energy levels. The first period's atoms have electrons in the first energy level. The second period's atoms have electrons in two different energy states. The third period's atoms have electrons in three different energy levels. The fourth period's atoms have electrons in four different energy levels. Typically, the number of the period itself is the same as the number of energy levels in each period. The first period's atoms have electrons in the first energy level.
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Find D subscript x y if
y = e^(-1/x^2)
Hint: remember the definition of derivative of natural log and use chain rule
The derivative of the natural log function y = e^(-1/x^2) is
2x^(-3)e^(-1/x^2)How to solve for the derivativeThe given function is
y = e^(-1/x^2)
The given function is rearranged as
y = e^(-1/x^2) = e^u such that u = (-1/x^2)
Applying chain rule
y = e^u
y' with respect to u = e^u
u = (-1/x^2) = -x^(-2)
u' with respect to x = 2x^(-3)
(y' with respect to u) * (u' with respect to x)
= e^u * 2x^(-3)
plugging in the value of u
= e^(-1/x^2) * 2x^(-3)
= 2x^(-3)e^(-1/x^2)
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ABCD is a quadrilateral.
Work out angle x.
Optional working
Answ
4
+
B.
8 cm
A
X
6 cm
D
29%
13 cm
C
The require angle of x is 52.4°
Given is a quadrilateral
The given diagonal divides the quadrilateral in two parts
the first part is a right angled triangle
Thus to find the side BD
we will use the Pythagoras theorem ;
So according to this theorem
AB² + AD² = BD² [ because BD is the hypotenuse ]
Given AB = 8 cm and AD = 6 cm
8² + 6² = BD²
this implies 64 + 36 = BD²
100 = BD which implies BD = 10 cm
To find x
we know that in triangle BCD
BD = 10 cm and CD = 13 cm
tan theta = [tex]\frac{13}{10}[/tex]
this means theta = [tex]tan^{-1}[/tex] [tex]\frac{13}{10}[/tex]
theta = 52.4°
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Answer:
39.07
use pythagros to find bd then use the sine rule substitute in the values
bd=10
beacuse a²+b²=c²
substitute in 8²+6²=c²
Many Texas cities have experienced substantial growth in population over the last 20 years. The growth of Houston, Texas, since 2015 is shown in the scatterplot. A least-squares equation that relates the number of years since 2015 to the population of that year (in millions) is given by Population = 0.025 (year) + 2.01.
Based on the residual plot, is a linear model suitable for modeling the population growth of Houston?
A linear model is suitable because a pattern is evident in the residual plot.
A linear model is not suitable because the residuals do not cluster around zero.
A linear model is not suitable because the residual plot shows a curved pattern.
A linear model is suitable because the residuals seem to be randomly scattered.
Based on the given residual plot, as regards the linear model, we can say that; A linear model is not suitable because the residual plot shows a curved pattern.
What is a residual Plot?
A residual plot is a plot that shows the difference between the observed response and the fitted response values.
The ideal residual plot is usually called the null residual plot, and it shows a random scatter of points that form an approximately constant width band around the identity line.
When it comes to finding out if a linear model will be suitable, we can say that the points will form a pattern when the model function is not correct.
Now, you might be able to transform variables or even add polynomial and interaction terms in order to remove the pattern.
Now, looking at the given graph, we can say that a linear model is not suitable because from the definitions above, we can see that the residual plot shows a curved pattern.
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33.21 divided by 9
What is the answer? And can you explain pls
Answer:
[tex]33.21 = \frac{3321}{100} \\ \\ \frac{33.21}{9} = \frac{3321}{100 \times 9} = \frac{3321}{900} = \frac{369}{100} = 3.69[/tex]Step-by-step explanation:
Thanks
Katelyn’s older brother borrowed money for school. He took out a loan that charges 6% simple interest. He will end up paying $720 in interest after 6 years. How much did Katelyn’s brother borrow for school?
The amount of money that Katelyn’s brother borrowed for school would be = $ 2,000.
What is interest?Interest in the amount of money that an individual pays in extra with a borrowed amount of money either from an individual or from the bank.
The formula for simple interest= Principal ×Time × Rate/100
Rate of payment= 6%
Time = 6 years
Simple interest = $720
Principal= X
From the formula above, make principal the subject of formula;
Principal = SI × 100/ T× R
= 720 × 100/ 6×6
= 72000/36
=$ 2,000
Therefore, the amount of money that Katelyn’s brother borrowed for school is $2,000.
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Ingia went to the farmers market to get ingredients. Determine the price per item of each vegetable.
4.1 6 onions for $1.80
12 mushrooms for $3 4.3 5 peppers for $5.50
4.2
What is -1/6 divided by 2/9
Answer:
Step-by-step explanation:
1. List out the numbers and divide
-1/6/2/9=
2. In division for fractions, the number or numbers on the right of the division side flip and change to multiply!
-1/6/2/9= -1/6*9/2= -9/12
3. Simplify!
-9/12= -3/4
Answer:
-3/4
Step-by-step explanation:
so you leave -1/6 but then you change the sign to multiply and the other fraction change it so if you had 2/9 it will be 9/2
so we get -1/6×9/2.
if you don't know how to multiply fractions i can explain just ask.
A boy paid $11
for a bottle with a cork.
A bottle costs $10
more than a cork.
How much does a cork cost?
Step-by-step explanation:
A boy paid $11 for a bottle with a cork. A bottle costs $10 more than a cork. How much does a cork cost?
cork: c
bottle: 10c
c + 10c = 11
11c = 11
c = $1
A cork costs $1
Step 1: –10 + 8x < 6x – 4
Step 2: –10 < –2x – 4
Step 3: –6 < –2x
Step 4: ________
What is the final step in solving the inequality –2(5 – 4x) < 6x – 4?
x < –3
x > –3
x < 3
x > 3
Answer: x < 3
Explanation: Once you reach step 3, you divide -2 on both sides. -2x cancels out, and -6 divided by -2 is 3
a - domain and range
b - intercepts
c - horizontal asymptotes
d - vertical asymptotes
e - oblique asymptotes
From given graph,
a - domain and range: (-∞, 3) ∪ (3, ∞)
b - intercepts: x = 0 and y = 0
c - horizontal asymptotes: y = 3
d - vertical asymptotes: x = 3
e - oblique asymptotes: No
In this question, we have been given a graph of a function.
From given graph we need to answer the following questions.
1) domain of function: (-∞, 3) ∪ (3, ∞)
the range of function : (-∞, 3) ∪ (3, ∞)
2) the intercepts:
x = 0, y = 0
3) horizontal asymptotes
A red dotted line y = 3 is a horizontal asymptotes
4) vertical asymptotes
A red dotted line x = 3 is a vertical asymptotes
5) Oblique asymptotes
The graph of function does not have any Oblique asymptotes
Therefore, from given graph,
a - domain and range: (-∞, 3) ∪ (3, ∞)
b - intercepts: x = 0 and y = 0
c - horizontal asymptotes: y = 3
d - vertical asymptotes: x = 3
e - oblique asymptotes: No
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What is the range of the given function?
{(-2, 0), (-4, -3), (2, −9), (0, 5), (−5, 7)}
O {x|x = -5, -4, -2, 0, 2)
Oyly = -9, -3, 0, 5, 7)
{x|x = -9, -5, -4, -3, -2, 0, 2, 5, 7}
Oyly = -9, -5, -4, -3, -2, 0, 2, 5, 7}
The range of the given function is:
Range: {-9,-3,0,5,7}
We are given ordered pair of set (x,y)
where, first value of ordered pair shows domain of function and second value of ordered pair shows range.
Range: It is output value of function.
Ordered pair: {(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}
We can write as:
f(-2)=0, f(-4)=-3, f(2)=-9, f(0)=5, f(-5)=7
The values of f(x) are the range of function.
We will make a set of second value of all ordered pair of given set.
Range: {-9,-3,0,5,7}
Hence we get the required range of the function.
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Find the side length of x. Round your answer to nearest hundredth
Answer:
9
Step-by-step explanation:
I hope this helps!
In the diagram ray MO bisects the measurement of
△MNP≅△QST.
What is m∠S?
Enter your answer in the box.
Answer:
78°
Step-by-step explanation:
∠M=∠Q
∠N=∠S
∠P=∠T
Answer:
m∠S =78°---------------------
Given
Two congruent triangles △MNP≅△QSTWe know that corresponding angles of congruent triangles are congruent (vertices in same order as name of triangle):
∠M ≅ ∠Q, ∠N ≅ ∠S, ∠P ≅ ∠TAngle S corresponds to angle N, hence their values are equal:
m∠S = m∠N = 78°Differentiate the function with respect to x.
Differentiation of the function [tex]f(x) = (-x^{2} - 4)x^{5}[/tex] with respect to [tex]x[/tex] is [tex]f'(x) = -7x^{6} - 20x^{4}[/tex].
What is the differentiation of the function?
A function differentiation is a method of displaying the rate of change of a function at a given moment. It is the slope of the tangent line at a point on a graph for real-valued functions.
We have,
[tex]f(x) = (-x^{2} - 4)x^{5}[/tex]
By simplifying the given function, we get
[tex]f(x) = -x^{7} - 4x^{5}[/tex]
Now, we will differentiate the given function with respect to [tex]x[/tex].
[tex]\frac{d}{dx} f(x) = \frac{d}{dx} (-x^{7} - 4x^{5})[/tex]
[tex]f'(x) = \frac{d}{dx} (-x^{7}) - \frac{d}{dx} (4x^{5}))[/tex]
[tex]f'(x) = -7x^{6} - 20x^{4}[/tex]
Hence, differentiation of the given function with respect to [tex]x[/tex] is [tex]f'(x) = -7x^{6} - 20x^{4}[/tex].
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This is not college level I just don't know how to change it but can I get some help?
Applying angle relationships, the measures of the numbered angles are:
m∠1 = 90°
m∠2 = 68°
m∠3 = 112°
m∠4 = 112°
m∠5 = 68°
m∠6 = 56°
m∠7 = 124°
m∠8 = 124°
How to Apply Angle Relationship?To calculate angle measurements that are formed by a transversal and parallel lines, we can apply the knowledge of the angle relationships that exist between the angle pairs in concerned. Some angle relationships are:
Corresponding angles are equal.Linear pair angles are equal to 180 degrees.Alternate interior angles are equal.Base angles of isosceles are equal.m∠1 = right angle [corresponding angles is the angle relationship]
m∠1 = 90°
m∠2 = 180 - m∠1 - 22 [triangle sum theorem]
Substitute
m∠2 = 180 - 90 - 22
m∠2 = 68°
m∠3 = 180 - m∠2
Substitute
m∠3 = 180 - 68
m∠3 = 112°
m∠4 = m∠3
m∠4 = 112°
m∠5 = 180 - m∠4
m∠5 = 180 - 112
m∠5 = 68°
m∠6 = 1/2(180 - m∠5)
m∠6 = 1/2(180 - 68)
m∠6 = 56°
m∠7 = 180 - 56
m∠7 = 124°
m∠8 = m∠7 [alternate interior angles is the angle relationship]
m∠8 = 124°
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In a psychology class, 30 students have a mean score of 87.7 on a test. Then 21 more students take the test
and their mean score is 67.7.
What is the mean score of all of these students together? Round to one decimal place.
mean of the scores of all the students.
The mean score of all the students is 79.5 and it is round off into one decimal place.
Mean
Mean refers the average of the given numbers and is calculated by dividing the sum of given numbers by the total number of numbers.
Given,
In a psychology class, 30 students have a mean score of 87.7 on a test. Then 21 more students take the test and their mean score is 67.7.
Here we need to find the mean score of all students.
In order order to find the mean score, we have to calculate the total score of the students by multiplying the mean score by the number of students then we get,
=> 30 x 87.7 = 2631
Similarly, the total score for 21 students is,
=> 21 x 67.7 = 1421.7
So, the 51 students, cumulative score is
=> 2631 + 1421. 7 = 4052.7
Therefore, the mean score is calculated as,
=> 4052.7/51
=> 79.464
When we round off the value into one decimal place then we get
=> 79.5
Therefore, the mean value of all the students is 79.5.
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3. One batch of pancakes needs 1 1/4 cups of pancake mix. One box has 9 cups of pancake mix How many batches of pancakes can be made with one box of pancake mix?
ching and his 4 brothers set up computers at their family company. how many computers did they set up if they each set up the same number of computers?
There are '5n' computers set up if they each set up the same number of computers.
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
Ching and his 4 brothers set up computers at their family company.
Now,
Let the number of computers for each person = n
The total number of persons = 5
So, We can formulate;
⇒ The number of computers set up if they each set up the same number of computers = 5n
Thus, There are '5n' computers set up if they each set up the same number of computers.
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The radius of a circle is 8 ft. Find its area in terms of pi
Answer:
Step-by-step explanation:
201.06ft²
Answer:
Step-by-step explanation:
15. Graph 6 and 6 on the number line.
A++
-6 5 4 3 2 1 0 +1 +2 +3 +4 +5 +6
Page 6
Wilson says both 6 and 6 have an absolute value of 6. Is
Wilson correct? Use the number line and words to explain why
or why not.
Yes, Wilson is right since "negative numbers" don't exist when you find the absolute value.
How Do You Define Absolute Value?Without taking into account direction, absolute value describes how far a number is from zero on the number line.A number's absolute value can never be negative.A number or phrase is most frequently represented by the absolute value sign, which consists of two vertical straight lines, around it|-6| = 6 denotes that "6 is -6 in absolute terms.""The absolute value of the phrase -2 minus x" is what |-2 - x| denotes.The meaning of -|x| is "the opposite of the absolute value of x."The number line can be used to graph equalities and inequalities that contain expressions with absolute value in addition to displaying the distance from zero.Therefore, Wilson is correct as there is no negative term in absolute value.
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An electrician cuts a 50 ft piece of wire into 3 pieces. The first piece is 4 ft longer than the second piece and the third piece is 2 feet shorter than the second piece. How long are the pieces?
The required length of the pieces is given as 20 ft, 16ft, and 14ft.
Given that,
An electrician cuts a 50 ft piece of wire into 3 pieces. The first piece is 4 ft longer than the second piece and the third piece is 2 feet shorter than the second piece. How long are the pieces is to be determined.
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
according to the question,
Length of the first, second, and third be x, y and z,
According to the question,
x + y + z = 50 - - - - - - - - (1)
x = y + 4
z = y - 2
put x and z in equation 1
y + 4 + y + y - 2 = 50
3y = 50-2
y = 48/3
y = 16 ft
Now,
x = 16 + 4 = 20 ft
z = 16 - 2 = 14 ft
Thus, the required length of the pieces is given as 20 ft, 16ft, and 14ft.
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What is 43+5673+20(1)
Answer:
5736
Step-by-step explanation:
calculator
Answer: 5736
Step-by-step explanation:
Zahra and some friends are going to the movies. At the theater, they sell a bag of
popcorn for $3.50 and a drink for $5. How much would it cost if they bought 8 bags
of popcorn and 5 drinks? How much would it cost if they bought p bags of popcorn
and d drinks?
Total cost, 8 bags of popcorn and 5 drinks:
Total cost, p bags of popcorn and d drinks:
The store bought a pair of shoes for $50 and sold them for $80. What percentage was the markup?
Answer: They resold them for $30 more than the original price.
Answer: 37.5%
Step-by-step explanation:
$80 - $50 = $30,
$30/$80 = 0.375 > 37.5%
Tina has 5345 beads . She has 3687 fewer beads than her sister . How many beads does her sister have ?
Answer:
Her sister has 9032 beads
Step-by-step explanation:
All you have to do is Tina's beads plus the extra number of beads that her sister has
5345 + 3687 = 9032
Given p(x)=x+7/3, if p(x)=13 find x
x = 32
Step-by-step explanation:
[tex]{ \tt{p(x) = \frac{x + 7}{3} }}[/tex]
If p(x) = 13, then
[tex]{ \tt{13 = \frac{x + 7}{3}}} [/tex]
[tex]{ \tt{13 \times 3 = x + 7}}[/tex]
[tex]{ \tt{39 = x + 7}}[/tex]
[tex]{ \tt{39 - 7 = x}}[/tex]
[tex]{ \red{ \boxed{ \blue{ \sf{x = 32}}}}}[/tex]
(6, y) and (-8, 4); slope: 1/7
For the given points (6, y) and (-8, 4) having slope = 1/7 the value of y = 10.
What is the slope of a line?
A line's slope, also known as its gradient, is defined as the value of a line's steepness or direction in a coordinate plane. Slope can be calculated using various methods given a line equation or the coordinates of points on a straight line.
If P(a, b) and Q(c, d) are two given points on a coordinate plane, then the slope of line PQ can be computed using the formula
[tex]Slope(m)=\frac{d - b}{ c - a}[/tex]
The given points are (6, y) and (-8, 4).
and the slope of the line is given as m = 7.
By using the slope of a line formula, we get
[tex]m = \frac{8-y}{-8-7}\\\\ \frac{1}{7}= \frac{8-y}{-8-7}\\\\\frac{1}{7}= \frac{8-y}{-14}\\\\\\8-y=-2\\y=8+2\\y=10[/tex]
Hence, the value of y is 10.
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A cone has a volume of 2411.52 cubic millimeters and a radius of 12 millimeters. What is its height? Use ≈ 3.14 and round your answer to the nearest hundredth.
The height of the cone given the volume of 2411.52 cubic millimeters and a radius of 12 millimeters is 16 millimeters.
How to find height of a cone?Volume of a cone = 2411.52 cubic millimetersRadius of the cone = 12 millimetersVolume of a cone = 1/3πr²h
2411.52 = 1/3 × 3.14 × 12 x 12 × h
2411.52 = 1/3 × 3.14 × 144h
2411.52 = 452.16h / 3
cross product7,234.56 = 452.16h
divide both sides by 452.16h = 7,234.56 / 452.16
h = 16 millimeters
In conclusion, the height of the cone is given by 16 milliliters.
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Wanda walked 43.4 km in 14 days. At this rate, how far would she walk in 40 days?
She would walk__km in 40 days.
Answer:
124 km
Step-by-step explanation:
Wanda walked 43.4 km in 14 days. At this rate, how far would she walk in 40 days? She would walk__km in 40 days.
First, figure km per day:
43.4/14 = 3.1 km per day
3.1 * 40 = 124 km
She would walk 124 km in 40 days.