Answer:
Lesser x: -9.41
Greater x: -6.59
Step-by-step explanation: khan academy
Given the balanced equation representing a reaction:
2H2 + O2 > 2H2O
The oxidation state of hydrogen in this reaction changes from
A)
–1 to +1
B)
–1 to +5
C)
0 to +1
D)
+5 to –1
Answer: The correct answer is A) -1 to +1
According to the DuPont 2012 Global Automotive Color Popularity Report, 23% of all cars manufactured in 2012 were white. In a random sample of 100 cars parked in long-term parking at Philadelphia International Airport, 19% of the cars were white. Identify the underlined values as parameters or statistics and give the appropriate variable. Spell out phat, x-bar, mu, sigma for the variable names. Which of the following statements istrue?
a. 19% and 23% are parameters, 100 is a statistic.
b. 23% is a parameter, 19% is a statistic.
c. 23% is a statistic, 19% is a parameter.
d. 19% and 23% are statistics, 100 is neither a parameter nor a statistic.
e. 19%, 23%, and 100 are all statistics.
Answer:
b. 23% is a parameter, 19% is a statistic.
Step-by-step explanation:
If the value is from a population, it is a parameter.
Otherwise, if the value is from a sample, it is a statistic.
23% of all cars manufactured in 2012 were white.
This is from the population(all cars), so 23% is a parameter.
In a random sample of 100 cars parked in long-term parking at Philadelphia International Airport, 19% of the cars were white.
100 is the size of the sample, which is neither a parameter, nor a statistic.
19% is from the sample of 100, so it is a statistic.
The correct answer is given by option b.
The admission fee at an amusement park is $20 for children and $35 for adults. On a certain day, 276 people entered the park, and the admission fees collected totaled $7620. How many children and how many adults were admitted?
Total number of children are 116 and adults are 160.
What is an equation?An equation is a combination of different variables, in which two mathematical expressions are equal to each other.
Let the number of children entered in park = x
And the number of adults entered in park = y
Fee for children = $20
Fee for adults = $35
According to given condition,
Total number of people = 276
⇒x+y = 276 (1)
Total fees collected = $7620
⇒20x+35y = 7620 (2)
By solving equation (1) and (2),
The value of x is 116
And value of y is 160
Total number of children are 116 and adults are 160.
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A roulette wheel consists of 18 red slots, 18 black slots, and 2 green slots. A player can wager $1 that a marble will land in a red slot, in which case the player would gain a $1. If the marble lands in a slot that isn't red, then the player loses their $1 wager. Let X represent the player's gain from a random $1 wager on red. Here's the probability distribution of X along with summary statistics:
Lose Win
X = gain (S) -1 1
Р(X) 20/38 18/38
Мean: Ax-$0.05
Standard deviation: ax$1.00
Suppose a player decides to wager $5 instead of winning $5.
Let Z represent the player's gain from a random $5 wager on red. possible outcomes become either losing or , so
What are the mean and standard deviation of Z? dollars?
Answer:
-$0.26 ; $5
Step-by-step explanation:
Given that :
____________ Lose ______ Win
X =$1 _______ - $1 ________ $1
P(X) _______20/ 38 _____ 18/38
Mean, Ux = - $0.05
Standard deviation, σx = $1.00
If the wager is $5 instead of $1
Mean = Σx*p(x)
Mean = (-5 * 20/38) + (5 * 18/38)
Mean = - 2.6315789 + 2.3684210
Mean (μ) = −0.26
Standard deviation :
Sqrt(Σx²p(x) - μ²)
[(-5^2)*(20/38) + (5^2)*(18/38)] - (-0.26^2)
(13.157894 + 11.842105) - 0.0676
= 24.999999 - 0.0676
= sqrt(24.932399)
= 4.9932353
= 5
Lia cut a long piece of into 2 pieces. One pieces of the string is 24 inches long, and the other piece of the string is 12 inches long. How many feet long was the piece of string before lia cut it?
Answer:
24+12=36you find the total length
Answer:
3 feet
Step-by-step explanation:
Write and solve an equation to find the missing dimension of the prism.
Volume = 1620 cm3
h
9 cm 9 cm
Equation:
Height:
cm
Height of prism is 20 cm
Calculation of rectangular prism:Given that;
Volume of rectangular prism = 1620 cm³
Length = 9 cm
Width = 9 cm
Find:
Height of prism
Computation:
Volume of rectangular prism = (l)(b)(h)
So,
(9)(9)(h) = 1620
(81)(h) = 1620
h = 20
Height of prism = 20 cm
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What is the average of 100, 54 and 88?
Answer:
about 80.6
Step-by-step explanation:
(100+(54+88))/3
ASTRONOMY!!!
How does the Sun affect electrical power on Earth?
A. Geomagnetic storms can cause surges in power lines that can damage transformers.
B. UV radiation from the Sun causes overheating of transformers.
C. X-rays may damage nuclear reactors by causing stray radiation
D. High-energy radiation interferes with electron in cabling and causes loss of electricity.
Answer:
I think it's
B. UV radiation from the Sun causes overheating of transformers.
Sorry if i'm wrong.
1 half of 4 over 5 = ____ fifth(s)
Answer:
2/5
Step-by-step explanation: 1/2 of 4/5 = 2/5
I need to know this fast
Answer:
396 Square feet
Step-by-step explanation:
1.) First find the side closest to you. 6 x 12 = 72. Then double it to match the parallel side. 72 x 2 = 144
2. Find the side to the right and left, 7 x 6 = 42. Then double it to match the parallel side. 42 x 2 =84
3.) Find the top side and bottom side. 12 x 7 = 84. Then double it to match the parallel side. 84 x 2 = 168
4.) Find the total surface area. 144+84+168=
5.) The total surface area is 396 square feet
Let me know if I am incorrect
7. Simplify
(12p27
(2p2q6)
Answer: 7776p^2q
Step-by-step explanation:
Find the solutions for 6x^2 -7x-20=0
Answer:
x=5/2, x=-4/3
Step-by-step explanation:
Given the points (8,9) and (2,7) find the slope I need help
Answer:
1/3
Step-by-step explanation:
7-9=-2
2-8=-6
2/6 is 1/3 when simplified
What is the next term in the following sequence?
54, -18, 6, ...
-2
3
2
-3
In a poll of students at the hockey championship, 87% of the students say that hockey is better than baseball.
(a) Explain why it is not a valid conclusion to say that hockey is more popular than baseball at the school.
Answer:
Sample Bias
Step-by-step explanation:
If you sample Hockey players on if their sport is better than baseball, chances are they will vote for their sport being better.
Melinda and Davy are making postcards to announce their new address. The table shows the number of postcards they can make together during each hour they are working. If they continue to make postcards at this rate, what is the total number they will make in 6 hours? Postcards
Number of Hours Number of Postcards
1 7
2 14
3 21
Answer:
3
Step-by-step explanation:
Can someone help me with the vertex of the parabola
Answer:
The vertex is (-1.5, 11.25)
Step-by-step explanation:
4) find the first five terms of the recursively defined sequence.
a1=5, an+1=-3an+1
Answer:
566556565*7*7/*7+666364
HELP PLS PLS pls pls
Answer:
129
Step-by-step explanation:
Answer:
129
Step-by-step explanation:
180 - 51 = 129
Can someone please help meee
Answer:
90 degrees
Step-by-step explanation:
If two angles are supplementary they are a linear pair which means they form a straight line, and if you know a straight line equals 180 degrees which is the total degrees of a triangle.
Now if you have two supplementary angles and they are congruent that means not only are they right angles but its half of 180 so you divide these pair of 2 by 180 giving you your total of 90 degrees.
Have a nice rest of your day !
State if the pair of triangles are similar. If so, state how you know they are similar and
complete the similarity statement
Mr. Taylor has 24 sports trophies. Of the trophies, 1
8 are wrestling trophies. How many
wrestling trophies does Mr. Taylor have?
Answer: 18 wrestling trophies.
Step-by-step explanation:
Find the slope of the line.
Answer:
0
Step-by-step explanation:
Any horizontal line has a slope of 0.
Which expression is equivalent to b less than 50?
A 50b
B b - 50
C 50/b
D 50 - b
Answer:
50-b
Step-by-step explanation:
Whatever letter/number it begins with, it's that minus the second letter/number.
A chemist wishes to mix a solution that is 12% acid. She has on hand 6 liters of a 4% acid solution and wishes to add some 16% acid solution to obtain the desired
12% acid solution. How much 16% acid solution should she add?
Complete the table.
Liters of
Solution
Percent Acid Liters of
(as a decimal) Pure Acid
0.04
6
Х
0.16
0.12
Answer:
25 liters of the 16% solution should be added.
Step-by-step explanation:
pure acid amount + pure acid amount = total pure acid amount
0.02*10 + 0.16*x = 0.12*(10+x) <<<---=== it is your balance equation; x is the amount (in liters) of the 16% solution.
0.02*10 + 0.16x = 0.12*10 + 0.12*x
0.16*x - 0.12*x = 0.12*10 - 0.02*10
(0.16 - 0.12)*x = 0.12*10 - 0.02*10
x = %280.12%2A10-0.02%2A10%29%2F%280.16-0.12%29 = 25.
Answer. 25 liters of the 16% solution should be added.
Check. %280.02%2A10+%2B+0.16%2A25%29%2F%2810+%2B+25%29 = 0.12 = 12% of concentration of the final mixture. ! Correct !
Question 17 (3 points)
Paul is signing a lease for a two-bedroom apartment that rents for $725/month. How much will Paul pay to move in if
he must pay first and last month's rent and a $500 security deposit?
Answer:
So If Paul needs to pay for 2 months of rent plus the 500$ in security deposit, then he has to pay 725+725+500=1950
can you solve these please and show your work
Hi. I need help with the following questions. ( These arent multiple choice)
Layout:
1.
2.
3.
Answer:
The top blank is D. Quadrilateral
The middle blank is B. Parallelogram
The last blank if A. Square
Which of the figures appear to to congruent
Answer:
C.
Step-by-step explanation:
so its 8p = 56 is the frist bit and the second is 7. BOOM
p=7, I don't know if this is a question or not