Answer:
A
Step-by-step explanation:
Help needed! Click on the picture. Thanks to the people that help :)
what is f(1) its for my math assignment
The EPA wants to know the daily level of pollutant discharge in the manufacturing district in Pittsburgh for February 2005. The monitoring equipment reveals that the mean daily discharge per factory (calculated as total areal discharge divided by total areal factories) is 30.2 tons with a standard deviation of 9.1 tons. Construct a confidence interval for the true population mean of pollutant discharge using a 95% level of confidence.
Answer:
The 95% confidence interval for the true population mean of pollutant discharge is (26.7 tons, 33.7 tons).
Step-by-step explanation:
Let X represent the daily level of pollutant discharge in the manufacturing district in Pittsburgh.
The monitoring equipment reveals that for the 28 days of the February month
Mean daily discharge per factory, ([tex]\bar x[/tex]) = 30.2 tons
Standard deviation daily discharge per factory, (s) = 9.1 tons
Compute the critical value of t for 95% level of confidence and (n - 1 =) 27 degrees of freedom as follows:
[tex]t_{0.05/2, 27}=2.052[/tex]
*Use a t-table.
Compute the 95% confidence interval for the true population mean of pollutant discharge as follows:
[tex]CI=\bar x\pm t_{\alpha/2, (n-1)}\cdot\frac{s}{\sqrt{n}}[/tex]
[tex]=30.2\pm 2.052\times\frac{9.1}{\sqrt{28}}\\\\=30.2\pm 3.53\\\\=(26.67, 33.73)\\\\\approx (26.7, 33.7)[/tex]
Thus, the 95% confidence interval for the true population mean of pollutant discharge is (26.7 tons, 33.7 tons).
If 7r + 5s = 35, then r = HELP THIS WAS DUE YESTERDAY
Answer:
r =5
Step-by-step explanation:
move 5s to the right
7r = 35 - 5s
divide both sides by 7r
How much cents are in 12 quarterS answer fast!!!!
Answer: 300 cents or 3 dollars
Step-by-step explanation: 12x25=300.
Answer:
300 CENTS
Step-by-step explanation:
hope this helps
The ratio of money in Terry's bank account to Faye's bank account was 3:5.
Terry then put £220 in his account and Faye withdrew £300 from her account.
They now had the same amount in their accounts.
How much did they initially have altogether?
Answer:
£780 and £1300
Step-by-step explanation:
The ratio in their accounts is 3 : 5 = 3x : 5x ( x is a multiplier )
Terry put £220 into his account, then 3x + 220
Faye withdrew £300 from her account then 5x - 300
They now have the same amounts in their accounts, thus
5x - 300 = 3x + 220 ( subtract 3x from both sides )
2x - 300 = 220 ( add 300 to both sides )
2x = 520 ( divide both sides by 2 )
x = 260
Thus initial amount in their accounts
3 × £260 = £780 ← Terry's account
5 × £260 = £1300 ← Faye's account
PLEASE HELP MEEEEEEEEEEEEE
The following is an incomplete paragraph proving that ∠WRS ≅ ∠VQT, given the information in the figure where segment UV is parallel to segment WZ:
Segments UV and WZ are parallel segments that intersect with line ST at points Q and R, respectively.
According to the given information, segment UV is parallel to segment WZ, while angles SQU and VQT are vertical angles. Angle VQT is congruent to angle SQU by the Vertical Angles Theorem. Because angles SQU and WRS are corresponding angles, they are congruent according to the Corresponding Angles Theorem. Finally, angle VQT is congruent to angle WRS by the ________ Property.
Which property of equality accurately completes the proof?
А Reflexive
B Substitution
C Subtraction
D Transitive
Answer:
The correct answer is Transitive
what is 200 times 1238
Step-by-step explanation:
the answer is 247,600
hope this helps
Answer: the answer is 247,600
Step-by-step explanation:
2.
-5x - 16 = 8x - 3
Step-by-step explanation:
-5x - 16 = 8x - 3
-5x - 8x = -3 + 16
-13x = 13
-13x/-13 = 13/-13
x = -1
A sandwich is 2 12 feet long. You decide to cut the sandwich into pieces that are 1 14 feet long. How many pieces will you cut?
Answer:
2 pieces
Step-by-step explanation:
2 1/2-1 1/4=1 1/4, so 2
what's 4 divided by 142.09 in long division
Answer: 35.522
Step-by-step explanation:
Answer:
35.5225
Step-by-step explanation:
4/142.09
look at each place starting in the hundredth place
how many times does 4 go into 14, 3 times
subtract the 12 from th 14 and you get a remainder of 2
drag the 2 down and you get 22
4 goes into 22 5 times
22-20=2
so on and so on
4/142.09
14-12=22 (3 times)
22-20=2 (5 times)
20-20=0 (5 times)
09-8=1 (2 times)
10-8=2 (2 times)
20-20=0 (5 times)
Thats as best as I can explain it, sorry if its confusing
Which expression is equal to (5−2i)−(1+3i)
Answer:
4-5i
Step-by-step explanation:
Answer:
4-5i
Step-by-step explanation:
(5-2i)-(1+3i)
5-2i-1-3i
5-1-2i-3i
4-5i
Which of the following values are solutions to the inequality –4 > 5x – 3?
A. -6
B. 7
C. 5
Answer:
B 7
Step-by-step explanation:
5 stars plz mark a brainleast
write each number in word form and short form
9) 543,698
10) 45,987,159.9
Answer:
9) five hundred and forty three thousand, six hundred and ninety-eight
500,000 + 40,00+ 3,000+ 600+ 90+ 8 = 543,698
10)forty-five million nine hundred eighty-seven thousand one hundred fifty-nine and nine tenths
40,000,000 + 5,000,000 + 900,000 + 80,000 + 7,000 + 100 + 50 + 9 + 0.9 = 45,987,159.9
Describe what you know about the angles of a triangle
Answer:
Similarity is it is beautiful like your mom
Step-by-step explanation:
All 3 angles of the triangle added up will be equal to 180 degrees.
Hope this helps, brainliest pls!
Laura needs to buy chips and soda for the guest at her party. Each large bag of chips cost 2.40 and each large bottle of soda costs 2.00. She had 48.00 to spend. Which graph represents the number of bags of chips and bottles of soda that Laura can buy?
Answer:
A. Bags of chips and bottleof soda
please find the value of x
Answer:
Step-by-step explanation:
A symbol for a value we don't know yet. It is usually a letter like x or y.
Example: in x + 2 = 6, x is the variable.
Why "variable" when it may have just one value? In the case of x + 2 = 6 we can solve it to find that x = 4. But in something like y = x + 2 (a linear equation) x can have many values. In general it is much easier to always call it a variable even though in some cases it is a single value.
Amanda, Bethany, and Christina are all sisters.
The sum of the ages of the sisters is 40. Amanda is 5 more than double Christina's age. The
difference between Bethany's and Christina's age is 3. Write a system for this scenario.
A+B+C= 40
2C +5=A
B-C=3
A is Amanda, B is Bethany and C is Christina
I HAVE 2 MIN TO ANSWER THIS, HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP ME PLEASE HELP!!!!!!!!!!!!?!!!!!¡!
Answer:
its A possibly
Step-by-step explanation:
Answer:
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Step-by-step explanation:
If (62)x = 1, what is the value of x and please explain
3. What do you notice?
which point lies on the graph of y=3/4x -2?
Answer:
4,0 0,3
Step-by-step explanation:
Which equation best represents the linear function graphed below? CAN YOU BE REALLY QUICKLY THIS IS A MAJOR GRADE AND I ONLY HAVE 90 MINUTES
Answer:
y+1= 1/4(x-4)
Step-by-step explanation:
y+1 = 1/4(x-4)
y+1 = 1/4x-1
y = 1/4x -2 -which is the equation of the line
A quadrilateral is shown below.
5bº
4bº
4bº
5b7
Find the value of the variable.
i need help loooool 9% of $50
Answer:
4.5
Step-by-step explanation:
.09 * 50 = 4.5
3. Corbett’s sold 3 more footballs than basketballs on Saturday. In total, they sold 27 balls. How many of each kind were sold?
4. A hamburger has twice as many calories as a bowl of soup. Together they have 738 calories. How many calories are in each?
5. Carmen’s golf score was 6 strokes less than Lisa’s. Their two scores totalled 168. What was each girl’s score?
6. The sum of two consecutive numbers is 191. What are the two numbers?
Answer:
3.
let basketballs be x
and footballs will be 3 + x
3 + x + x = 27
2x = 27 - 3
2x = 24
x = 12
basketballs were 12 and footballs 15
4.bowl of soup x
hamburger 2x
2x + x = 738
3x = 738
x = 246
bowl of soup 246 calories
hamburger 492 calories
5. lisa x
carmen x - 6
x - 6 + x = 168
2x = 174
x = 87
lisa 87 strokes and carmen 81 strokes
6. first number x
second number x + 1
x + x + 1 = 191
2x = 190
x = 95
first number is 95 and second number is 96
-3(x+4) what’s the answer to this?
Answer:
-3x-12
Step-by-step explanation:
Answer:
-3x-12
Step-by-step explanation:
This is a problem of distribution.
Distribute means to multiply the variable outside the perenthesis to what's inside the perenthesis.
What you are going to do is distribute the -3 to the x and 4
-3 times x is -3x
-3 times 4 is -12
Make sure the signs are correct and the new expression is -3x-12
An item has a listed price $95. if the sales tax rate is 7%, how much is the sales tax?
Answer:
$6.65
Step-by-step explanation:
Total sales tax = Item cost [tex]*[/tex] sales tax rate
Item Price: $95
Sales tax rate: 7% = 0.07
[tex]95*0.07=6.65[/tex]
Total sales tax = $6.65
I hope this helps! (✿◕‿◕✿)
3. In the month of August, a car dealership sold a total of 72
cars and trucks. The dealership reported that for every 4
passenger cars sold, there were 2 trucks sold. How many of
each type of vehicle were sold in the month of August?
Answer:
The dealership sold in August 24 trucks and 48 cars
Step-by-step explanation:
Equations
A dealership reported they sold a total of 72 vehicles.
It also determined that for every 4 cars sold, they sold 2 trucks. It means that they sold twice as many cars as trucks.
Let x be the number of trucks sold.
It follows that 2x is the number of cars sold.
The sum of both numbers must equal 72:
x + 2x = 72
Simplifying:
3x = 72
Solving:
x = 72 / 3 = 24
The number of cars were
2x= 48
The dealership sold in August 24 trucks and 48 cars
If 3/4 the way though the game Sam had 21 points, how many points would he expect to have for a full game? points
Answer:
I'm guessing 28
Step-by-step explanation:
because 3/4 of 21 is 28