a) The expected value of each $1 bet in roulette is of: -$0.988.
b) The interpretation is given as follows: Over time, you should expect to lose about 999 cents for every dollar you bet.
How to obtain the expected value of a discrete distribution?The expected value of a discrete distribution is obtained as the sum of each outcome multiplied by it's respective probability.
The three-number bet is when one sequence of three numbers has to be correctly chosen, hence the probability of winning is of:
p = 1/(10³) = 1/1000.
(as there is only one correct sequence, and for each number, there are 10 outcomes).
The payout is given as follows:
11:1.
That is, if you win, you earn 11 times the amount you bet.
Considering a bet of $1, the distribution of earnings is given as follows:
P(X = 11) = 1/1000.P(X = -1) = 999/1000.Hence the expected value of the bet is:
E(X) = 11/1000 - 999/1000 = -$0.988.
Which is the amount you are expected to lose for every dollar you bet.
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Avery is designing a large rectangular sign. They want the sign to have an area of 2 m² and a width of 4/5m.
How tall should the sign be?
The rectangular design should be 2.5 m tall.
What is area of rectangle?
A flat surface of a specific shape can be thought of as the area it occupies in space. It is calculated as a "number of" square units (square centimeters, square inches, square feet, etc.) The quantity of unit squares that can fit inside a rectangle is known as the area of a rectangle. The flat surfaces of laptop monitors, chalkboards, canvases, and other objects are a few instances of rectangular shapes. To determine the area that these items occupy, use the formula for a rectangle's area.
Here area of rectangle = 2[tex]m^2[/tex]
And width of the rectangle w= 4/5 m .
Using area of rectangle formula ,
=> A = h*w
=> 2= h*4/5
=> h = 10/4 = 2.5 m.
Therefore the rectangular design would be 2.5 m tall.
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The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.2 years and a standard deviation of 0.6 years. He then randomly selects records on 28 laptops sold in the past and finds that the mean replacement time is 3 years.
Assuming that the laptop replacement times have a mean of 3.2 years and a standard deviation of 0.6 years, find the probability that 28 randomly selected laptops will have a mean replacement time of 3 years or less.
P(M ≤ 3 years) =
Enter your answer as a number accurate to 4 decimal places.
Based on the result above, does it appear that the computer store has been given laptops of lower-than-average quality? Yes or no question.
Yes- The probability of this data is unlikely to have occurred by chance alone.
No- The probability of obtaining this data is high enough to have been a chance occurrence.
No- The probability of obtaining this data is high enough to have been a chance occurrence.
What is Probability?It is a branch of mathematics that deals with the occurrence of a random event.
Test statistic (z) = (sample mean - population mean) ÷ (population sd/√n)
sample mean = 3 years
population mean = 3.2 years
population sd = 0.6 year
n = 28
z = (3 - 3.2) ÷ (0.6/√28) = -0.2 ÷ 0.1134 = -1.764
The cumulative area of the test statistic is subtracted from 1 to obtain the probability that 28 randomly selected laptops would have a mean replacement time of 3 years or less
The cumulative area is 0.9982.
Therefore, the probability is (1 - 0.9982 = 0.0018)
Hence No- The probability of obtaining this data is high enough to have been a chance occurrence.
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Make d the subject of this formula:
d+x=V
Answer:
d = V- x
Step-by-step explanation:
To make 'd' as the subject, isolate 'd'.
To isolate d, subtract 'x' from both sides,
d +x = V
d + x - x = V - x
d = V - x
The formula using d as the subject is d = V-x.
The formula is d+x = V
The subject of the formula is nothing but a variable that is being worked out. Here, we have to convert the given formula to describe d as the subject.
According to the property of equality, the two sides of the equation should be balanced. To solve the given expression, we use the subtraction property of equality.
The subtraction property of equality refers to balancing an equation by using the subtraction operation on both sides of the equation.
Therefore, subtract x on both sides of the given formula,
[tex]\begin{aligned}d+x&=V\\d+x-x&=V-x\\d&=V-x\end{aligned}[/tex]
Therefore, the final answer is d=V-x.
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You are driving (too fast) down a straight, country road. The posted limit is 40 miles per hour along this road. Two police officers are posted one mile apart along this road tracking vehicle speeds and are in contact with each other. At the first officer’s position, you drive by going 39 miles per hour. At the second officer’s position 63 seconds later, you drive by going 38 miles per hour. The second officer pulls you over and gives you a ticket. Were they justified in giving you a ticket, even though you were not caught speeding?
Hint: refer to the Mean Value Theorem to assist with your justification and reasoning.
Yes, they justified giving us a ticket, even though we were not caught speeding, because we drove at a speed higher than the posted speed limit.
It is given that we are driving down a straight country road. The posted limit is 40 miles per hour along this road. Two police officers are posted one mile apart along this road, tracking vehicle speeds, and are in contact with each other. At the first officer’s position, we drive by going 39 miles per hour. At the second officer’s position, 63 seconds later, we drive by, going 38 miles per hour.
The second officer pulls us over and gives us a ticket. We will use the mean value theorem to check whether getting a ticket was justified or not. Let the maximum speed be "v" that we reach between the officers at time "c". Let the function f(t) denote the distance at time "t".
f'(c) = [f(b) - f(a)]/(b - a)
v = (1 - 0)/(63 - 0)
v = 1/63 miles per second
We need to convert the speed into miles per hour.
v = 3600/63 = 57.143 miles per hour
The speed is higher than the posted speed limit. Hence, they justified giving us a ticket, even though we were not caught speeding.
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the portion of students taking summer classes decreased 6.3% from 2015 to 2016. if 38% of students took summer classes in 2015, what portion were taking summer classes in 2016
The portion that were taking summer classes in 2016 is 31.4%.
How to calculate the value?From the information, the portion of students taking summer classes decreased 6.3% from 2015 to 2016 and it was stated that 38% of students took summer classes in 2015.
In this case, the portion of the people taking dinner classes will be:
= Original percentage - Reduction in percentage
= 38% - 3.6%
= 31.4%
The percentage is 31.4%
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At 10:00 a.m. han and Tyler both start running toward each other from opposite ends of a 10 mile path along the river how han can run at a pace of 12 miles per minute Tyler can run at a pace 15 miles per minute how far does han run after a half an hour
Answer: 2.5 miles
We are given that
Total length of path=10 mile
Han runs at a pace=12 minutes per mile
Tyler runs at a pace=15 minutes per mile
We have to find the distance run by Han after a half hour.
Half hour=30 minutes
Using unitary method
Han runs distance in 12 minutes=1 mile
Han runs distance in 1 minute= mile
Han runs distance in 30 minutes= miles
Hence, Han runs 2.5 miles after half hour.
Step-by-step explanation:
how many quarts of pure antifreeze must be added to 5 quarts of a 10% antifreeze solution to obtain a 30% antifreeze solution?
The number of quarts of pure antifreeze that must be add to obtain a 30% antifreeze solution would be = 15 quart.
What is an antifreeze?Antifreeze is defined as the solution that can be used to lower the freezing point of a liquid based substance.
The percentage solution of antifreeze 1 = 10
The quantity of quart of antifreeze 1 = 5
The percentage solution of antifreeze 2 = 30%
The quantity of quart of antifreeze 2 = x
Using the formula;
if 10% = 5
30% = X
make X the subject of formula:
X = 30×5/10
X = 150/10
X = 15 quarts.
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algebraically manipulating the formula for finding the simple interest find the principal deposited in a savings account which earned $3500 in interest at a simple interest rate of 8.5% for 10 years
Rachel is a stunt driver, and she's escaping from a building that is about to explode!
The variable d models Rachel's distance from her exit (in meters) t seconds after the cameras
began recording the stunt.
d=-38t+220
What is Rachel's speed?
meters per second
As per the concept of distance-speed-time formula, the speed of Rachel is 38 meters per second
Distance-speed-time formula
The general time formula to calculate the distance-speed-time for any task is given as
[Time = Distance ÷ Speed].
And the SI unit of time is seconds (s).
Given,
Rachel is a stunt driver, and she's escaping from a building that is about to explode! And the variable d models Rachel's distance from her exit (in meters) t seconds after the cameras began recording the stunt.
The function of d=-38t+220
Now, we have to find the speed of Rachel.
We already know that the speed is calculated as,
=> v = dx/dt
Here we have the distance is a function of time,
Now, we have to apply it one the given formula then we get,
=> v = d/dt( 38t + 220)
After the differentiation we get the value of
=> v = 38 m/s
Here the derivative of a constant (here 220) is zero.
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How do you do this problem? Show your work
15 x 2 - 8 x 40 + 896 x 2 =
The answer to the arithmetic 15 x 2 - 8 x 40 + 896 x 2 is 1502
What is arithmetic?Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them
Using the PEDMAS rule which states that mathematical expressions with multiple operators need to be solved from left to right in the order of BODMAS.
15 x 2 - 8 x 40 + 896 x 2 can be solved thus:
Solving the multiplication first;
(15 x 2) - (8 x 40) + (896 x 2)
solving the addition and subtraction
30 - 320 + 1792
1502
Using PEDMAS, the answer to the arithmetic is 1502
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Find the coordinates of point P along the directed line segment AB, from A(1,6) to B(-2,-3), so that the
ratio of AP to PB is 5 to 1.
The coordinates are P().
Answer: question
Step-by-step explanation: answer
Last year, Lisa opened an investment account with $6600. At the end of the year, the amount in the account had increased by 6.5%. How much is this increase in dollars? How much money was in her account at the end of last year?
Increase in amount:
Year-end amount:
Answer: $429
Step-by-step explanation:
$6600 + 6.5% = $7029
$7029 - $6600 =$ 429
34. A six-sided die is thrown three times. What
is the probability of getting a prime number
on all three rolls?
Step-by-step explanation:
The probability of getting prime numbers is =3/6=1/2. So, in 3 throws the probability of getting prime numbers is (1/2)^3=1/8=0.125
Students were asked to bring their favorite fruit to class. 93% of the fruits consisted of bananas, apples, and oranges. If oranges were twice as popular as bananas, and apples were 19 percentage points less popular than bananas, what are the percentages of each individual fruit?
Answer:
apples 19%, bananas 38%, oranges 36%, and other fruits 7%
Which value es NOT defined
Answer:
It is B
Tangent theta is undefined when cosine theta equals zero. Remember that identity.
Show Me How
Question Content Area
Cost Flow Methods
The following three identical units of Item K113 are purchased during April:
Item Beta Units Cost
April 2 Purchase 1 $165
April 15 Purchase 1 169
April 20 Purchase 1 173
Total 3 $507
Average cost per unit $169 ($507 ÷ 3 units)
Assume that one unit is sold on April 27 for $210. Determine the gross profit for April and ending inventory on April 30 using the (a) first-in, first-out (FIFO); (b) last-in, first-out (LIFO); and (c) weighted average cost method.
Gross Profit Ending Inventory
a. First-in, first-out (FIFO) $fill in the blank 1
$fill in the blank 2
b. Last-in, first-out (LIFO) $fill in the blank 3
$fill in the blank 4
c. Weighted average cost $fill in the blank 5
$fill in the blank 6
Feedback Area
Feedback
The determination of the gross profit for April and the ending inventory on April 30, using the FIFO, LIFO, and weighted average cost methods, is as follows:
Gross Profit Ending Inventory
FIFO $45 $342
LIFO $37 $334
Weighted Average $41 $338
What is the gross profit?The gross profit is the difference between the net sales revenue and the cost of goods sold.
It is the first profit point in the income statement which measures the financial performance of an entity during a period.
What is the ending inventory?The ending inventory is the difference between the cost of goods available for sale and the cost of goods sold, depending on the inventory method in use.
Some of the inventory methods include FIFO, LIFO, Weighted Average, and Specific Identification.
Item Beta Units Cost
April 2 Purchase 1 $165
April 15 Purchase 1 169
April 20 Purchase 1 173
April 27 Sales 1 $210
Total 3 $507
Average cost per unit $169 ($507 ÷ 3 units)
Cost of goods available for sale = $507
a) First-in, First-out (FIFO):
Ending inventory = $342 ($169 + $173)
Cost of goods sold = $165 ($507 - $342)
Gross profit = $45 ($210 - $165)
b) Last-in, First-out (LIFO):
Ending inventory = $334 ($165 + $169)
Cost of goods sold = $173 ($507 - $334)
Gross profit = $37 ($210 - $173)
c) Weighted average cost method:
Ending inventory = $338 (2 x $169)
Cost of goods sold = $169 (1 x $169)
Gross profit = $41 ($210 - $169)
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The graph of a function g is shown below. Find the following. g(-3)
Answer:
g(- 3) = 3.5Step-by-step explanation:
GivenGraph of the function g(x)To findThe value of g(-3)SolutionTo find the value of g(x), find the point x on the horizontal axis, then find the intersection of the vertical segment from that point to the graph, then trace the corresponding value of intersection on the vertical axis. This is the value of the function at the point x.
This is all done on the attached.
The value of g(- 3) is 3.5.
Determining the Regression Equation The table below shows the approximate height of a ball thrown up in the air after x seconds. A 2-column table with 5 rows. The first column is labeled time (seconds) with entries 0, 1, 2, 3, 4. The second column is labeled height (feet) with entries 5, 90, 140, 160, 150. Which quadratic model best represents the data? f(x) = –16x2 + 99x + 6 f(x) = –36x2 + 37x + 5 f(x) = 36x2 + 37x + 5 f(x) = 16x2 + 99x + 6
The equation of the quadratic model is f(x) = -16x^2+99x+6.
From the given table:
A 2-column table with 5 rows. The first column is labeled time (seconds) with entries 0, 1, 2, 3, 4. The second column is labeled height (feet) with entries 5, 90, 140, 160, 150.
we know that:
regression equation = ax^2 + bx + c.
a∑x^4+b∑x^3+c∑x^3 = ∑x^2y
a∑x^3+b∑x^2+c∑x = ∑xy
a∑x^2+b∑x+cn = ∑y
After substituting and solving these three equations we get:
a = -15.714
b = 98.857
c = 5.571
Approximate values
a = -16
b = 99
c = 6
substitute these values
f(x) = -16x^2+99x+6.
Therefore the equation of the quadratic model is f(x) = -16x^2+99x+6.
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what is the common denominator of 5, 12, 3 , 8
Answer:
i think the denominator of 5,12,3,8, is 24
Find the value of x so that the ratios are equivalent.
9:x and 54:8
Answer:
1 1/3
Step-by-step explanation:
9*6=54
So 6x=8
x=1 1/3
William sold 100 tickets for his show.
An adult ticket costs £5.50 and a child ticket costs £1.50.
William's ticket sales totalled £430.
a) How many adult tickets did he sell?
b) How many child tickets did he sell?
Number of ticket sold for adult = 70
Number of ticket sold for child = 30
Given that,
The number of tickets sold = 100
Cost of ticket for adult = £5.50
Cost of ticket for child = £1.50
Total sold amount = £430.
Let number of ticket for adult = x
And number of tickets for child = y
We know that,
A mathematical definition of an equation is a claim that two expressions are equal when they are joined by the equals sign ("=").
Therefore,
Forming the equation according to the given information,
We get two equation as,
5.50x + 1.50y = 430 ...(i)
x + y = 100 ...(ii)
Now, Subtract equation (ii) with multiplication 1.50 from (i)
4x = 280
x = 70
Now put the values of x in equation (ii)
y = 30
Hence number of ticket for child is 30 and for adult is 70.
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If you have to drink 400 milliliters 4 times a day, how many liters is that for one day?
Answer:
1.6 liters
Explanation:
400x4=1600
1000ml=1l
1600/1000=1.6
Write the quadratic equation whose roots are 2 and −6, and whose leading coefficient is 4.
Answer:
4x^2 + 16x - 48
Step-by-step explanation:
A quadratic equation with roots 2 and -6 has to have factors of (x - 2) and (x + 6) since both equal 0 when either 2 or 6 are plugged in. To get a leading coefficient of 4, multiply the product of the two factors by 4. When the 4 is distributed it becomes the leading coefficient:
4(x - 2)(x + 6)
4(x^2 + 4x - 12)
4x^2 + 16x - 48
wich car take 9 gallons of gas and drives 252 miles
The car which covers 28 miles on 1 gallon of gas that car will take 9 gallons of gas and drives 252 miles.
We know that the relation between distance, speed, and time is given by:
distance = speed * time
speed = distance / time
We are given;
Distance covered by the car = 252 miles
Gas used to cover 252 miles = 9 gallons
We will solve the given problem using the unitary method.
Since for 9 gallons of gas, the car covered a distance of 252 miles.
So, for 1 gallon of gas, the car covered a distance of 252 / 9 miles = 28 miles.
So, the car will drive 28 miles per gallon.
Thus, a car which covers 28 miles on 1 gallon of gas that car will take 9 gallons of gas and drives 252 miles.
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The expression 0.12x + (x − 35) models the final price of a scooter with an instant rebate in a state that charges sales tax.
a) Which part of the expression represents the discounted price before tax?
b) Which part of the expression represent the amount of sales tax, in dollars (not the tax rate, the amount of sales tax paid)?
a. The part of the expression that represents the discounted price before tax is (x − 35).
b. The of the expression represent the amount of sales tax, is 0.12x.
What is an expression?Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both.
In this case, the expression 0.12x + (x − 35) models the final price of a scooter.
It should be noted that 0.12x represented the sale tax. In this case, the sales tax is 12% which was depicted as 0.12.
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What is the greatest Comon factor of 30,72,54?
The greatest common factor of 30, 72, and 54 would be 6.
What is the general form of the equation of the line shown?
Answer:
y-2=0
Step-by-step explanation:
Add the 2 to the other side and it would be y=2
Help pls bro hurry svevd evr
Answer: i believe its B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
because ×=82822929929283838399388
A chemical company makes two brands of antifreeze. The first brand is 70% pure antifreeze, and the second brand is 95% pure antifreeze. In order to obtain 170 gallons of a mixture that contains 80% pure antifreeze, how many gallons of each brand of antifreeze must be used?
first brand: ?
Second brand ?
please dont answer if you dont know it.
The gallons of first brand is 102 gallons and that of the second brand is 68 gallons.
According to the question,
We have the following information:
The first brand is 70% pure antifreeze, and the second brand is 95% pure antifreeze. 170 gallons of a mixture contains 80% pure antifreeze.
Now, let's take the amount of first brand to be x gallons and that of the second brand to be y gallons.
So, we have the following expressions:
x+y = 170
x = 170-y ....(1)
70x/100 + 95y/100 = (80*170)/100
70x+95y = 13600
Now, putting the value of x from equation 1:
70(170-y)+95y = 13600
11900-70y+95y = 13600
11900+25y = 13600
25y = 13600-11900
25y = 1700
y = 1700/25
y = 68
Now, putting this value of y in equation 1:
x = 170-68
x = 102
Hence, the gallons of first brand is 102 gallons and that of the second brand is 68 gallons.
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Question 10
An electronics retailer purchases a laptop for $430 per unit. Per unit, the expense is 19% of the selling price
and profit is 25% of the selling price. What is the regular selling price per unit?
(rounded to nearest cent)
The regular selling price per unit for the laptop is $298.6.
How to calculate the price?Let the regular price per unit be x.
The expense is 19% of the selling price and profit is 25% of the selling price. This will be illustrated as:
x + (19% × x) + (25% × x) = 430
x + 0.19x + 0.25x = 440
1.44x = 430
Divide
x = 430 / 1.44
x = 298.6
The price is $298.6
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