Answers
a) If f(y) is a probability density function, then both f(y) ≥ 0 for all y in its support, and the integral of f(y) over its entire support should be 1. eˣ > 0 for all real x, so the first condition is met. We have
[tex]\displaystyle \int_{-\infty}^\infty f(y) \, dy = \frac14 \int_0^\infty e^{-\frac y4} \, dy = -\left(\lim_{y\to\infty}e^{-\frac y4} - e^0\right) = \boxed{1}[/tex]
so both conditions are met and f(y) is indeed a PDF.
b) The probability P(Y > 4) is given by the integral,
[tex]\displaystyle \int_{-\infty}^4 f(y) \, dy = \frac14 \int_0^4 e^{-\frac y4} \, dy = -\left(e^{-1} - e^0\right) = \frac{e - 1}{e} \approx \boxed{0.632}[/tex]
c) The mean is given by the integral,
[tex]\displaystyle \int_{-\infty}^\infty y f(y) \, dy = \frac14 \int_0^\infty y e^{-\frac y4} \, dy[/tex]
Integrate by parts, with
[tex]u = y \implies du = dy[/tex]
[tex]dv = e^{-\frac y4} \, dy \implies v = -4 e^{-\frac y4}[/tex]
Then
[tex]\displaystyle \int_{-\infty}^\infty y f(y) \, dy = \frac14 \left(\left(\lim_{y\to\infty}\left(-4y e^{-\frac y4}\right) - \left(-4\cdot0\cdot e^0\right)\right) + 4 \int_0^\infty e^{-\frac y4} \, dy\right)[/tex]
[tex]\displaystyle \cdots = \int_0^\infty e^{-\frac y4} \, dy[/tex]
[tex]\displaystyle \cdots = -4 \left(\lim_{y\to\infty} e^{-\frac y4} - e^0\right) = \boxed{4}[/tex]
Related Questions
Graph the equation. y= - 2x
Answers
Answer: The picture
Step-by-step explanation: if you mean graph that means graph the coordantes.
write an equation for the line in standard form that passes through the following points (-2,-3) (-3,-6)
Answers
ANSWER: y = 3x + 3
Ok done. Thank to me :>
Change 3/4 to a decimal! Please explain step by step to get marked as brainliest
Answers
Answer:
The answer is 0.75
Step-by-step explanation:
The line in a fraction that separates the numerator and denominator can be rewritten using the division symbol. So, to convert a fraction to a decimal, divide the numerator by the denominator. If required, you can use a calculator to do this. This will give us our answer as a decimal.
Another method without a calculator is:
Step 1: Find a number you can multiply by the bottom of the fraction to make it 10, or 100, or 1000, or any 1 followed by 0s.
Step 2: Multiply both top and bottom by that number.
Step 3. Then write down just the top number, putting the decimal point in the correct spot (one space from the right hand side for every zero in the bottom number)
Example:
Convert 3/4 to a Decimal:
Step 1: We can multiply 4 by 25 to become 100
Step 2: Multiply top and bottom by 25. It gives us 75/100.
Step 3: Write down 75 with the decimal point 2 spaces from the right (because 100 has 2 zeros);
Answer = 0.75
Parth created a Box-and-Whisker Plot to show the average weight of the fish he caught over the weekend. What information from the 1st Quartile does the graph give you?
A. Three fourths of the fish he caught were larger than 22 pounds.
B. The average weight of the fish he caught was 40 pounds.
C. Three fourths of the fish he caught were less than 22 pounds.
D. The largest fish he caught was 63 pounds.
Answers
The 1st Quartile that the Box-and-Whisker Plot shows tells us that: A. Three fourths of the fish he caught were larger than 22 pounds.
Recall:
In a Box-and-Whisker Plot, about 25% of the data will be below the first quartile while 75% will be above the first quartile, that is Three fourths of the data will be above the first quartile and one-fourths will be below the first quartile.Thus, the given Box-and-Whisker Plot as shown in the diagram below shows that the first quartile is 22 pounds.
Therefore, the 1st Quartile that the Box-and-Whisker Plot shows tells us that: A. Three fourths of the fish he caught were larger than 22 pounds.
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Answer: A...
Step-by-step explanation:I trust the guy above me....
PLS HELP BEST ANSWER=BRAINLIEST
3a² - ac + 2c - 6a/ 3a - c = a - 2
i have been looking everywhere but i cannot find the steps on how to simplify/solve this
PLS SHOW STEPS
Answers
Answer:
a-2=a-2
Step-by-step explanation:
Here it is, you just have to notice that the numerator has common factors alternated. You will then collect the same parentheses and simplify with the denominator.
Answer:
Step-by-step explanation:
Parentheses are missing in your problem statement if you intend to simplify ...
[tex]\dfrac{3a^2-ac+2c-6a}{3a-c}\\\\=\dfrac{a(3a-c) -2(3a-c)}{3a-c}\qquad\text{factor pairs of terms}\\\\=\dfrac{(a-2)(3a-c)}{(3a-c)}\\\\=\boxed{a-2}\qquad\text{cancel common factors}[/tex]
The "steps" are ...
factor numerator (and denominator, if necessary)cancel common factorsHelp me pllllllllllease! I have only got 2 minutes!
When I divide an integer by 15, the remainder is an integer from 0 to 14. When divide an integer by 27, the remainder is an integer from 0 to 26. For instance, if the integer is 100 then the remainders are 10 and 19, which are different. How many integers from 1 to 1000 leave the same remainders after division by 15 and after division by 27?
Answers
Answer:
Two minutes for what???
Which expression is equal to 6/7?
Answers
Answer:
Option C
The answer is 6 ÷ 7
Step-by-step explanation:
6/7 which means 6 divided by 7 i.e., 6 ÷ 7
Thus, The answer is 6 ÷ 7
-TheUnknownScientist 72
Which expression is equivalent to 53p + (16p + 7p)
Answers
Answer:
u777766665655566667777777777777
76p is the equivalent expression of 53p + (16p + 7p)
What is Expression?An expression is combination of variables, numbers and operators.
The given expression is 53p + (16p + 7p)
Fifty three times of p plus sixteen p plus seven p.
In the given expression p is the variable and plus is the operator.
We need to find the equivalent expression.
Equivalent expressions are expressions that work the same even though they look different.
53p + (16p + 7p)
76p
Hence, 76p is the equivalent expression of 53p + (16p + 7p)
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Draco runs a rate of 8 miles in 2.5 hours, how
fast does Draco run?
Answers
3.2 mile per hour
8/ 3.2
The answer is A but I couldn’t tell you why. If someone know, please let me know.
Answers
Answer:
a.0.311
Step-by-step explanation:
BRAINLIEST ANSWERIn AJKL, j = 75 cm, k = 23 cm and
Answers
Answer:
The length of side j is 11.85cm
Step-by-step explanation:
Given that
In triangle JKL,
Side k=LJ=3.7cm
To find side j=KL:
By using sine rule,
We can write as
Using property of triangle,
Thus,
The length of side j is 11.85cm
The plans for a shed call for a rectangular floor with a perimeter of 186 ft. The length is two times the width. Find the length and width.
Answers
Answer:
length: 62 ft
width: 31 ft
Step-by-step explanation:
Let w represent the width. Then the length is 2w and the perimeter is ...
P = 2(L+W)
186 = 2(2w +w)
31 = w . . . . . . . . . divide by 6
2w = 2(31) = 62
The length of the shed is 62 feet; its width is 31 feet.
Ricky ran 3/4 of a mile in 1/12 of an hour. What was Ricky´s average speed?
Answers
Answer: 9
Step-by-step explanation:
3/4mile takes 1/12 hours
so a whole hour is 3/4 / 1/12 = 3/4*12 = 9miles/hour
Answer:
3/2 miles per hour
Step-by-step explanation:
To find his average speed, divide 3/4 mile by 1/2 hour:
3 2
----- * ------ = 3/2 miles per hour
4 1
Research workshop: Generating Research questions and evaluating sources.
Take notes for two sources
Take notes on your second source
Answers
Based on the information, the best research question that Juan should choose will be "How does playing a team sport affect a child's development?"
A research question simply means a question that a researcher wants to answer. It should be noted that choosing a research question is an important element in research.
From the complete question, it should be noted that since Juan is writing a paper about children who play team sports, and he has different research questions, he should choose the one that conveys the research appropriately.
In this case, the best option will be "How does playing a team sport affect a child's development?"
Learn more about research questions on:
https://brainly.com/question/25257437
Help hep help help math math
Answers
Answer:
-2
Step-by-step explanation:
the input, or domain is always replacing x
y=-2x+6
y=-2(4)+6
y=-8+6
y=-2
What is the second number in the sequence?
Answers
Answer:
Step-by-step explanation:
Let "n" be the second odd number in the sequence
(n - 2) + n + (n + 2) + (n + 4) + (n + 6) = 135
5n + 10 = 135
5n = 125
n = 25
23 + 25 + 27 + 29 + 31 = 135
factorise the quadratic expression
pls help me I'll give brainliest
x²+8x-48
Answers
[tex]x^2+8x-48\\\\=x^2 + 12x -4x -48\\\\=x(x+12) -4(x+12)\\\\=(x-4)(x+12)[/tex]
SOEMONE PLEASE TELL ME DID I CLICK THE RIGHT ONE
PLEASE PLEASE HELP ME
Answers
Answer:
Yes.
Step-by-step explanation:
I had a problem just like this and you are correct.
(-7,-4) (-11,-2) slope
Answers
Answer:
1/3
Step-by-step explanation:
-2-4 = -6
-7-11 = -18
plz help me to answer
Answers
22/3 sorry I accidentally deleted steps
Answer them all please
Answers
Answer:
see the attachment
i hope it helps u ✌️✌️✌️☠️a) The highest common factor and the least common multiple are 12 and 48, respectively.
b) The highest common factor and the least common multiple are 12 and 72, respectively.
c) The highest common factor and the least common multiple are 8 and 160, respectively.
d) The highest common factor and the least common multiple are 12 and 48, respectively.
e) The highest common factor and the least common multiple are 14 and 840, respectively.
Procedure - Determination of the Highest Common Factor and the Least Common Multiple of two integersIn this question we must determine the highest common factor and the least common multiple of two integers.
The highest common factor consists in the maximum product of common prime numbers, of the two numbers that divides it, and the least common multiple consists in the product of prime numbers, common and not, of the two numbers, that creates a product that it is greater or equal to the greater integer.
Now, we proceed to determine the numbers for each case:
a) 12 and 48First, we factorize each integer:
[tex]12 = 2^{2}\times 3[/tex], [tex]48 = 2^{4}\times 3[/tex]
Then the highest common factor and the least common multiple are, respectively:
[tex]LCM = 2^{4}\times 3 = 48[/tex], [tex]HCF = 2^{2}\times 3 = 12[/tex]
The highest common factor and the least common multiple are 12 and 48, respectively. [tex]\blacksquare[/tex]
b) 24 and 36First, we factorize each integer:
[tex]24 = 2^{3}\times 3[/tex], [tex]36 = 2^{2}\times 3^{2}[/tex]
Then, the highest common factor and the least common multiple are, respectively:
[tex]LCM = 2^{3}\times 3^{2} = 72[/tex], [tex]HCF = 2^{2}\times 3 = 12[/tex]
The highest common factor and the least common multiple are 12 and 72, respectively. [tex]\blacksquare[/tex]
c) 32 and 40First, we factorize each integer:
[tex]32 = 2^{5}[/tex], [tex]40 = 2^{3}\times 5[/tex]
Then, the highest common factor and the least common multiple are, respectively:
[tex]LCM = 2^{5}\times 5 = 160[/tex], [tex]HCF = 2^{3} = 8[/tex]
The highest common factor and the least common multiple are 8 and 160, respectively. [tex]\blacksquare[/tex]
d) 24, 48 and 60First, we factorize each integer:
[tex]24 = 2^{3}\times 3[/tex], [tex]48 = 2^{4}\times 3[/tex], [tex]60 = 2^{2}\times 3 \times 5[/tex]
Then, the highest common factor and the least common multiple are, respectively:
[tex]LCM = 2^{4}\times 3 \times 5 = 48[/tex], [tex]HCF = 2^{2}\times 3 = 12[/tex]
The highest common factor and the least common multiple are 12 and 48, respectively. [tex]\blacksquare[/tex]
e) 42, 56 and 70First, we factorize each integer:
[tex]42 = 2\times 3 \times 7[/tex], [tex]56 = 2^{3}\times 7[/tex], [tex]70 = 2\times 5\times 7[/tex]
Then, the highest common factor and the least common multiple are, respectively:
[tex]LCM = 2^{3} \times 3 \times 5 \times 7 = 840[/tex], [tex]HCF = 2\times 7 = 14[/tex]
The highest common factor and the least common multiple are 14 and 840, respectively. [tex]\blacksquare[/tex]
To learn more on prime numbers, we kindly invite to check this verified question: https://brainly.com/question/4184435
Which equation is correct and shows that 42 is 7 times the size of 6?
42 × 2 = 7
42 × 6 = 7
42 ÷ 2 = 7
42 ÷ 6 = 7
Answers
I hope this helps
Find m
∠
K
M
L
∠KML.
Answers
Answer:
m∠KML = 35°
Step-by-step explanation:
This is an isosceles triangle because 2 of the sides are equal so we know the 2 unknown angles are equal. The 3 angles of any triangle always add up to 180° so since we know 1 angle is 110° then the 2 unknown angles must add up to 70° (because 180° minus the known 110° leaves us with 70°). Since we know the 2 unknown sides are equal 70° ÷ 2 = 35°. So, m∠KML = 35°
!PLEASE ANSWER ASAP! THANK YOU!
if g(n) varies inversely with n and g(n) = 9 when n = 4 then find the value when g(n)=8.
round final answer to the tenths place. if answer is a whole number then put a zero in the tenths place before entering your answer.
Answers
Answer:
Step-by-step explanation:
I'm ASSUMING you want to find n where g(n) = 8
g(n) = a/n
g(4) = 9 = a/4
a = 36
g(n) = 8 = 36/n
n = 36/8 = 4.5
James is at the JL Long Run. He has exactly $32
and will purchase a shirt for $12. What percent of
his money will James spend on the shirt?
Answers
Part/whole= x/100
Let x= percentage of
money
12/32= x/100
1200/32= 37.5%
A line with a slope of 10 passes through the point (0,4). What is its equation in
slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
Answers
Answer:
y=10x+4
Step-by-step explanation:
y-y1=m(x-x1)
y-4=10(x-0)
y-4=10(x)
y-4=10x
y=10x+4
To get to the next term in this sequence, multiply the last term by 2.5. What is the value of the next term?
1, 2.5, 6.25, 15.625, ...
HELP ASAP WILL GIVE BRAINLIEST
Answers
Answer:
39.0625
Step-by-step explanation:
15.625 times 2.5= 39.0625
You're just multiplying each value by 2.5
1 times 2.5= 2.5
2.5 times 2.5= 6.25
6.25 times 2.5= 15.625
and then 15.625 times 2.5= 39.0625
brainless for the person who gets this right!
which expression its equivalent
Answers
If we expand the parentheses, and multiply everything inside with everything outside, we get
4•6x + 4•11
Which is equal to 24x + 11
Select All equivalent expressions to 4( x + 2)
Answers
Answer:
3x 3-x and 3+x
find answer
the rounded one
Answers
Answer:
229.6 square units
Step-by-step explanation:
19.9×16.8=334.32
19.9-4-4=11.9
16.8-4-4= 8.8
11.9×8.8= 104.72
334.32-104.72= 229.6 sq units