On Monday, 5 painters took 7 hours and 36 minutes to paint an office.
On Tuesday, 8 painters are painting another office the same size.
a) Assuming the painters work at the same rate, how long will it take 8 painters to paint the office?
Give your answer in hours and minutes.
The 8 painters will take 12 hours and 9.6 minutes to paint the office. The result is obtained by comparing the two variables, worker and time duration.
How to calculate working time for a certain number of workers?On Monday, 5 painters took 7 hours and 36 minutes to paint an office.On Tuesday, 8 painters are painting another office with the same size.If the they work at the same rate, find the time needed for the 8 painters to finish their job!
Let's say
w = number of workerst = time durationWe convert the unit of time in hours.
t₁ = 7 h 36 min
t₁ = (7 + 36/60) h
t₁ = (7 + 0.6) h
t₁ = 7.6 hours
If they work at the same rate, the number of workers and time durations of each day are directly proportional. So,
w₁/w₂ = t₁/t₂
5/8 = 7.6/t₂
t₂ = 8/5 × 7.6
t₂ = 12.16 hours
In hours and minutes,
t₂ = 12 h + (0.16 × 60) min
t₂ = 12 h 9.6 min
Hence, to paint the office, the 8 painters will take 12 hours and 9.6 minutes.
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Divide 1/7 divided by 6
|__|
Enter your answer as a fraction in simplest form by filling in the boxes.
Answer fast due today!
No bots or getting reported
Answer:
1/42
Step-by-step explanation:
1/7 ÷ 6/1
1 x 1 = 1
------------
7 x 6 = 42
1/42
already simplified to the fullest
hope that helps!
The Gallup Poll asked a random sample of 1785 adults if they attended church during the past week. Let p
∧
be the proportion of people in the sample who attended church. A newspaper report claims that 40% of all U.S. adults went to church last week. Suppose this claim is true. a. Verify the conditions for a valid sampling distribution for p : b. Describe the sampling distribution of p : c. Of the poll respondents, 44% said they did attend church last week. Find the probability of obtaining a sample of 1785 adults in which 44% or more say they attended church last week, assuming the newspaper report's claim is true.
a. The conditions for a valid sampling distribution for p are:
Randomization Condition: The sample of 1785 adults must be selected randomly from the population of all U.S. adults.
10% Condition: The sample size, 1785, must be less than 10% of the population of all U.S. adults.
Success/Failure Condition: The number of successes (people who attended church) and failures (people who did not attend church) in the sample must both be at least 10.
b. The sampling distribution of p is approximately normal with mean equal to the true proportion of U.S. adults who attended church last week, which is given as 0.40 in the newspaper report. The standard deviation of the sampling distribution can be calculated using the formula:
sqrt[(p*(1-p))/n]
where p is the true proportion and n is the sample size. Substituting p=0.40 and n=1785, we get:
sqrt[(0.40*(1-0.40))/1785] = 0.014
Therefore, the sampling distribution of p has mean 0.40 and standard deviation 0.014.
c. To find the probability of obtaining a sample of 1785 adults in which 44% or more say they attended church last week, assuming the newspaper report's claim is true, we need to calculate the z-score and use a standard normal table or calculator to find the corresponding probability.
The z-score can be calculated using the formula:
z = (x - mu) / sigma
where x is the sample proportion, mu is the population proportion (given as 0.40), and sigma is the standard deviation of the sampling distribution (calculated as 0.014 above). Substituting x=0.44, mu=0.40, and sigma=0.014, we get:
z = (0.44 - 0.40) / 0.014 = 2.857
Using a standard normal table or calculator, we find that the probability of obtaining a z-score of 2.857 or higher is approximately 0.0021.
Therefore, the probability of obtaining a sample of 1785 adults in which 44% or more say they attended church last week, assuming the newspaper report's claim is true, is approximately 0.0021.
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Find the abscissa on the curve x2=2y which is nearest
to a
point (4, 1).
The abscissa on the curve x^2 = 2y which is nearest to the point (4,1) is x = √(3/8).
Given the equation x^2 = 2y.
The coordinates of the point are (4,1).We have to find the abscissa on the curve that is nearest to this point.So, let's solve this question:
To find the abscissa on the curve x2 = 2y which is nearest to the point (4,1), we need to apply the distance formula.In terms of x, the formula for the distance between a point on the curve and (4,1) can be written as:√[(x - 4)^2 + (y - 1)^2]But since x^2 = 2y, we can substitute 2x^2 for y:√[(x - 4)^2 + (2x^2 - 1)^2].
Now we need to find the value of x that will minimize this expression.
We can do this by finding the critical point of the function: f(x) = √[(x - 4)^2 + (2x^2 - 1)^2]To do this, we take the derivative of f(x) and set it equal to zero: f '(x) = (x - 4) / √[(x - 4)^2 + (2x^2 - 1)^2] + 4x(2x^2 - 1) / √[(x - 4)^2 + (2x^2 - 1)^2] = 0.
Now we can solve for x by simplifying this equation: (x - 4) + 4x(2x^2 - 1) = 0x - 4 + 8x^3 - 4x = 0x (8x^2 - 3) = 4x = √(3/8)The abscissa on the curve x^2 = 2y that is nearest to the point (4,1) is x = √(3/8).T
he main answer is that the abscissa on the curve x^2 = 2y which is nearest to the point (4,1) is x = √(3/8).
The abscissa on the curve x^2 = 2y which is nearest to the point (4,1) is x = √(3/8).
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You deposit $500 in an account that pays 4% interest compounded yearly. What is the balance after 5 years?
Simplify ALL of the way and round to the NEAREST whole number
Answer:
$562.43
Step-by-step explanation:
Solve the system using the addition method. Write your answer as an ordered pair.If there is no solution, write NS for your answer.s 6x + 5y = 251 4x – 5y = 15Answer 2 PointsKeypadKeyboard Shortcuts
Given:
\(\begin{gathered} 6x+5y=25\ldots\ldots\ldots\ldots(1) \\ 4x-5y=15\ldots\ldots\ldots\ldots(2) \end{gathered}\)To find: The value of x and y
Explanation:
Adding (1) and (2) we get,
\(\begin{gathered} 6x+5y+4x-5y=25+15 \\ 10x=40 \\ x=4 \end{gathered}\)Substitute x=4 in equation (2) we get,
\(\begin{gathered} 6(4)+5y=25 \\ 24+_{}5y=25 \\ 5y=25-24 \\ 5y=1 \\ y=\frac{1}{5} \end{gathered}\)Hence, the solution is,
\((4,\frac{1}{5})\)Final answer:
\((4,\frac{1}{5})\)What is the area of the rectangle shown on the coordinate plane?
3
2+
Х
12 square units
18 square units
21 square units
28 square units
Answer:
21 units
Step-by-step explanation:
7x3 is 21
if marvin cannon completed 81 successful free throws put of 90 attempts what percent were unsuccessful
Total attempt = 90
Successful throws = 81
Unsuccessful = Total attempt - Successful
= 90 - 81
=> 9
To calculate the percentage of unsuccessful, we will use the formula:
\(undefined\)A is the point with coordinates (4 6)
B is the point with coordinates (d 12)
The gradient of the line AB is 3
Work out the value of d
Answer:
d = 6
Step-by-step explanation:
Given the coordinates A(4, 6) and B(d, 12) with the gradient of AB to be 3
Gradient m = y2-y1/x2-x1
Substitute the given values
3 = 12-6/d-4
3 = 6/d-4
Cross multiply
3(d-4) = 6
Expand
3d - 3(4) = 6
3d - 12 = 6
Add 12 to both sides
3d - 12 + 12 = 6 + 12
3d = 18
Divide both sides by 3
3d/3 = 18/3
d = 6
Hence the value of d is 6
If you
toss a coin 4 times,
what
is the probability of getting at least 3 tails? Show your
work.
what
is the probability of getting exactly 3 tails? Show your
work.
Answer:
Therefore, the probability of getting at least 3 tails is 1/16 + 1/4 = 5/16 or 0.3125.
The probability of getting exactly 3 tails is just 1/4, as we calculated above.
Step-by-step explanation:
To find the probability of getting at least 3 tails when tossing a coin 4 times, we need to add the probabilities of getting 3 tails and 4 tails.
The probability of getting a tail on one toss is 1/2, and the probability of getting a head is also 1/2.
The probability of getting 4 tails is (1/2)^4 = 1/16 because there is a 1/2 chance of getting a tail on each toss, and the events are independent, so we multiply the probabilities together.
The probability of getting 3 tails is (4 choose 3) * (1/2)^4 = 4/16 = 1/4 because we need to choose which 3 tosses will be tails (this can be done in (4 choose 3) = 4 ways), and there is a 1/2 chance of each of those tosses being a tail, with a 1/2 chance of the last toss being a head.
Solve the equation
3x²-17x+10=0
Answer:
(3x-2) (x-5)
Step-by-step explanation:
30 = -15 X -2
-17 = -15 + -12
3x2 - 15x - 2x +10
factorise
3x(x-5) - 2(x-5)
(3x-2) (x-5)
I need a answer fast thanks!
Answer:
Chart:
x y
-6 11
3 5
15 -3
-12 15
Step-by-step explanation:
The only things you can plug in are the domain {-12, -6, 3, 15}
Plug in the domain into equation to find y.
-6 :
y = -2/3 (-6) +7
y = +47
y=11
(-6,11)
3:
y = -2/3 (3) +7
y = -2 +7
y = 5
(3, 5)
15:
y = -2/3 (15) +7
y = -10 +7
y = -3
(15 , -3)
-12:
y = -2/3 (-12) +7
y = 8 + 7
y= 15
(-12,15)
Answer:
1) 11
2) 3
3) -3
4) -12
Step-by-step explanation:
eq(1):
\(y = \frac{-2}{3} x + 7\\\\y - 7 = \frac{-2}{3} x\\\\x = (y - 7)\frac{-3}{2} \\\\x = (7-y)\frac{3}{2} ---eq(2)\)
1) x = -6
sub in eq(1)
\(y = \frac{-2}{3} (-6) + 7\\\\y = \frac{12}{3} + 7\\\\y = 4+7\\\\y = 11\)
2) y = 5
sub in eq(2)
\(x = (7-5)\frac{3}{2} \\\\x = 3\)
3) x = 15
sub in eq(1)
\(y = \frac{-2}{3} 15 + 7\\\\y = \frac{-30}{3} +7\\\\y = -10 + 7\\\\y = -3\)
4)
sub in eq(2)
\(x = (7-15)\frac{3}{2} \\\\x = -8\frac{3}{2}\\ \\x = -12\)
leo ate 3/5 cup of strawberries and jack ate 7/10 cup of strawberries. how much more did jack eat than leo?
Jack ate 1/10 cup more strawberries than Leo
The problem states that Leo ate 3/5 cup of strawberries, and Jack ate 7/10 cup of strawberries. We need to find out how much more Jack ate than Leo.
To solve this problem, we first need to find a common denominator for the two fractions. The denominator is the bottom number of a fraction, which represents the total number of equal parts that make up a whole.
The smallest common denominator for 5 and 10 is 10. We can convert the fraction 3/5 into an equivalent fraction with a denominator of 10 by multiplying both the numerator and denominator by 2. This gives us 6/10.
Now, we have two fractions with the same denominator: 6/10 and 7/10. To find out how much more Jack ate than Leo, we can subtract the fraction representing what Leo ate from the fraction representing what Jack ate:
7/10 - 6/10 = 1/10
Therefore, Jack ate 1/10 cup more strawberries than Leo did.
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Katie baked 215 cookies that she wants to divide equally among her 32 classmates. How many whole cookies will each student get, and how many will be leftover?
A) 5, r5
B) 6, r10
C) 6, r23
D) 7, r0
Answer:
6 r10
Step-by-step explanation:
If you do 215 divided by 32 you get 6.71875 so i just rounded your answers and got B) if not be its D)
Answer:
C
Step-by-step explanation:
Which of these sets of ordered pairs would define a line with a negative slope?
A. (5, 5) and (0, 1)
B. (2, 3) and (-4, -1)
C. (3, 6) and (5, 1)
D. (2, 3) and (76)
From the following sets of ordered pairs, line c, (3, 6) and (5, 1), has a negative slope.
To determine the slope of a line given two points, we can use the formula:
slope = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are the coordinates of the two points.
If the slope is negative, it means the line is decreasing as we move from left to right, or in other words, it has a negative slope.
Let's apply the formula to each set of ordered pairs:
A. slope = (1 - 5) / (0 - 5) = -4 / -5 = 4/5 (positive slope)
B. slope = (-1 - 3) / (-4 - 2) = -4 / -6 = 2/3 (positive slope)
C. slope = (1 - 6) / (5 - 3) = -5 / 2. (negative slope)
D. This set has only one point (2, 3) and is therefore not sufficient to define a line.
Therefore, only option C has a negative slope. Option B has a positive slope. Option A has a positive slope. Option D is not sufficient to define a line.
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Solve for how many employees did the company have a year ago?
Answer
35000
Explanation
\(\begin{gathered} \frac{x}{1}=\frac{48000}{1.38} \\ x=35000 \end{gathered}\)Daniel earns $18. 50 an hour, with time-and-a-half for hours worked over 37 a week. His clock hours for a week are 9. 5, 8. 5, 10, 10, and 10. 75. How much is his weekly
To calculate Daniel's weekly pay, add his regular pay and overtime pay: Weekly pay = $1038.31.
To calculate Daniel's weekly pay, we need to determine his regular hours and his overtime hours.
Regular hours = 37 hours
Overtime hours = Total hours worked - Regular hours
Total hours worked = 9.5 + 8.5 + 10 + 10 + 10.75 = 49.75 hours
Overtime hours = 49.75 - 37 = 12.75 hours
Daniel's regular pay for 37 hours is:
$18.50/hour x 37 hours = $684.50
Daniel's overtime pay for 12.75 hours is:
$18.50/hour x 1.5 = $27.75/hour (time-and-a-half rate)
$27.75/hour x 12.75 hours = $353.81
Therefore, Daniel's weekly pay is the sum of his regular pay and overtime pay:
Weekly pay = $684.50 + $353.81 = $1038.31
Therefore, Daniel's weekly pay is $1038.31.
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Complete question:
Daniel earns $18.50 an hour, with time-and-a-half for hours worked over 37 a week. His clock hours for a week are 9. 5, 8. 5, 10, 10, and 10.75. How much is his weekly pay?
Determine whether there is a good line of best fit for the given graph. Then, if there is a good line of best fit, determine if the correlation is
positive or negative.
Answer:
The line's slope equals the difference between points' y-coordinates divided by the difference between their x-coordinates. Select any two points on the line of best fit. These points may or may not be actual scatter points on the graph. Subtract the first point's y-coordinate from the second point's y-coordinate.
Find the volume of the rectangular prisim 18 in 10 in 5 in
Answer:
\(900m^3\)
Step-by-step explanation:
Volume is found when you multiply length by height by width.
So, in this case, 18 times 10 times 5.
\(18*10*5=180*5=900\)
So, \(900m^3\) is the answer
Hope this helped! :)
Whats is 50% of $5.00 ? giving brainliest.. Fun little quiz for points and brainliest :)
Answer:
$2.50
Step-by-step explanation:
Answer:
2.50
Step-by-step explanation:
5.00/2= 2.50
Hpe this helps!
amy, beth, and jo listen to four different songs and discuss which ones they like. no song is liked by all three. furthermore, for each of the three pairs of the girls, there is at least one song liked by those two girls but disliked by the third. in how many different ways is this possible?(2012 amc 12b
If there is at-least one-song liked by those two girls but disliked by the third, then the "different-ways" this is possible is 132 ways.
There are ⁴C₃ ways to choose the "3-songs" which are liked by "3-pairs" of girls.
There are 3! ways to find the three songs are liked by which pair of girls.
In total, there are ⁴C₃×3! possibilities for the first "3-songs".
There are "3-cases" for fourth song, let that song be "D".
Case 1: Song "D" is disliked by all three girls means there is only one possibility.
Case 2: Song "D" is liked by exactly one girl means there are three possibility.
Case 3: Song "D" is liked by exactly two girls means there are three pairs of girls to choose from.
However, there is an overlap when "other-song" is liked by "same-pair" of girl is counted as "fourth-song" at some point, in which "case-D" will be counted as one of first "three-songs" liked by same girls.
Counting the overlaps, there are "three-ways" to choose pair with overlaps and 4×3=12 ways to choose what the other "two-pairs" like independently.
In total, there are 3×12=36 over-lapped possibilities,
Therefore, there are ⁴C₃ × 3! ×(3+1+3)-36 = 132 ways for the songs to be likely by the girls.
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The focus group techniques fall under the qualitative research
paradigm. With reference to the above statement examine the
qualitative research paradigm.
A qualitative research paradigm is a research approach that focuses on understanding and interpreting subjective experiences, meanings, and social phenomena.
It involves collecting and analyzing non-numerical data to gain insights into individuals' perspectives and the social context in which they exist. Focus group techniques are one of the methods used within the qualitative research paradigm to gather data through group discussions.
The qualitative research paradigm aims to explore and understand the complexity and nuances of human experiences, behaviors, and social phenomena. It recognizes the importance of context and seeks to generate rich and in-depth understandings rather than generalizable conclusions. Qualitative research methods involve collecting data through methods such as interviews, observations, and document analysis. The data collected is typically in the form of words, images, or other non-numerical formats. Researchers then analyze the data using various techniques, such as thematic analysis or grounded theory, to identify patterns, themes, and meanings.
Focus group techniques are one of the commonly used methods within the qualitative research paradigm. Focus groups involve bringing together a small group of participants who share common characteristics or experiences to engage in a facilitated discussion on a specific topic of interest. The group interaction allows participants to share their perspectives, experiences, and opinions while also influencing and being influenced by others in the group. This method provides rich qualitative data and allows researchers to explore group dynamics, collective meanings, and shared understandings.
Overall, the qualitative research paradigm and focus group techniques emphasize the importance of understanding subjective experiences, social interactions, and contextual factors to gain insights into human phenomena.
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let h(x)=x2−3x 2−x2−4x 4, what is h′(−5)?
The value of the function given by term h(x) = \(\frac{x^2-3x+2}{-x^2-4x+4}\) , the n the value of the function h'(-5) is -239.
Let h(x) = \(\frac{x^2-3x+2}{-x^2-4x+4}\)
so to find the value of h'(5),
h(x) = \(\frac{x^2-3x+2}{-x^2-4x+4}\)
by using the formula,
\(\frac{d}{dx} \frac{f(x)}{g(x)} = \frac{g(x)d/dxf(x) - f(x) d/dxg(x)}{g(x)^2}\)
h'(x) = \(\frac{(-x^2-4x+4)(2x-3)-(x^2-3x+2)(-2x-4)}{(-x^2-4x+4)^2} \\\\\frac{(-(-5)^2-4(-5)+4)(2(-5)-3)-((-5)^2-3(-5)+2)(-2(-5)-4)}{(-(-5)^2-4(-5)+4)^2} \\\\\= \frac{13-252}{1\\} \\\\= -239\)
A function is a relationship between a set of inputs and a set of allowable outputs that has the condition that each input is associated to precisely one output. Let A and B be any two non-empty sets; mapping from A to B is only a function if every element in set A has one end and only one image in set B.
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What expression is equivalent to -4x-36
A. 4(x-9)
B.2(2x-18)
C.-2(2x- 18)
D.-4(x+9)
Answer:
\( - 4(x + 9) \\ - 4 \div - 4 = 1 \\ - 36 + - 4 = 9\)
a fair coin is tossed 29 times. what is the probability that at most 27 heads occur? a) 0.00000006 b) 0.00000081 c) 0.00000076 d) 0.99999994 e) 0.99999919 f) none of the above.
Option- D is correct that is the probability that at most 27 heads occur is 0.99999994.
Given that,
A fair coin is tossed 29 times.
We have to find what is the probability that at most 27 heads occur.
We know that,
A fair coin is tossed 29 times.
n=29
Probability of heads p=1/2
q= 1-p
q=1-1/2=1/2
We get
P (X=x) = ⁿCₓ qⁿ⁻ˣ pˣ
Now, the probability that at most 27 heads occurs is
P(X<27)
=1-[P(X=28)+ P(X=29)]
=1-[²⁹C₂₈(1/2)²⁹⁻²⁸(1/2)²⁸- ²⁹C₂₉(1/2)²⁹⁻²⁹(1/2)²⁹]
=1-[²⁹C₂₈(1/2)²⁹- ²⁹C₂₉(1/2)²⁹]
=1-[28+1](1/2)²⁹
=1-29×0.00000000186
=0.999999945
Therefore, Option- D is correct that is the probability that at most 27 heads occur is 0.99999994.
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Helpp I will mark brainliestttt
Answer:
25
Step-by-step explanation:
.45x25+10.00= 21.25
.65x25+5.00=21.25
I know how to do this, but for some reason got it wring on a Test. Can someone demonstrate how to do it so that I know what I'm doing wrong?
Answer:
Answer on a graph
Given the box plot, will the mean or the median provide a better description of the center?
A. The mean, because the data distribution is symmetrical
B. The mean, because the data distribution is skewed to the left
C. The median, because the data distribution is skewed to the left
D. The median, because the data distribution is skewed to the right
hello, can anyone help me out? ill give brainliest
Answer:
ur correct
Step-by-step explanation:
if ∠N and ∠Y are the same then we know the missing angle is 30.°
30
Step-by-step explanation:
do angle sum property
x + z + y = 180
60 + 90 + y = 180
150 + y = 180
y = 180-150
y = 30
Solve for x.
4−(2x+4)=5
A. x=32
B. x=−52
C. x=−10
D. x = 6
x = - 2.5
Step-by-step explanation:Hi there !
4 - (2x + 4) = 5
4 - 2x - 4 = 5
- 2x = 5
2x = - 5
x = - 5 : 2
x = - 2.5
Good luck !