Answer:
7. EXPERIMENTAL DESIGN
8. OBSERVATIONAL STUDY
Step-by-step explanation: Conducting researches may be structured as being observational or experimental. The difference between the two methods lies thus ;
Observational study requires that subjects or variables employed in the research study are data collected from a source or variables which aren't tampered with during the course of the research study. Here, variables or subjects are not subjected to any treatment before inference is made. Such is the case in scenario (8) whereby inference was made after observing variables involved in the research for 6 years without applying any treatment to either variable before inference was drawn or made.
Experimental design however, involves the actual application of treatment on the subjects involved in the study and their response being noted in other to make a conclusion. The groups may be divided into two ; the treatment group and the placebo group just like in the scenario above.
Giving out brainiest
Last minute, Help me out please and thank you!!
The volume of a box is modeled by the function
V x) = x + 2x2 - 11x - 12. Identify the values
of x for which the volume is 0 and use the graph
to factor V(X).
Answer: 2(x- 6)(x - 1)
Step-by-step explanation:
simplifly 3x + 2 – 3x + 7 +5x and find the coefficient in the simplified expression
Answer:
3x + 2 - 3x + 7 + 5x = 5x + 9
Step-by-step explanation:
The coefficient is 5.
free brazil how do you do 2 divided by 10
Answer:
2/10=0.2
Step-by-step explanation:
What I did is I divided 2 and 10 as shown above and I got 0.2.
I think you mean 10÷5=2
There are 200 Hungarian Forints to $1. How many Hungarian Forints are there in $150?
Step-by-step explanation:
$1 = 200 Hungarian Forints
$ 150 = 150×200
= 30,000 Hungarian Forints is the answer.
Answer:
30,000 Hungarian Forints in $150
What is the solution to the equation?
1/3x + 4/3(x + 1) -1/6 = 5/6
A) -1/5
B) 1/5
C) -1/3
D) 1/3
Answer:
A.) - 1/5
Step-by-step explanation:
I divided each side by factors that do not contain the variable.
A restaurant served 100 burgers last night, 90% of which were well done. What fraction of burgers were well done
Answer:
9/10 or 90/100
Step-by-step explanation:
The well done burgers were out of 100 and the percentage is 90
A police checkpoint is set up on New Years Eve to catch drunk drivers. It is known that 8% of drivers on New Years Eve have a blood-alcohol level that is above the legal limit. It is also known that 32% of drivers in the area never drink and drive, but are simply bad drivers. The remaining 60% of drivers never drink and drive and are good drivers. At this particular checkpoint, the police stop 85% of the drunk drivers, stop 38% of the bad drivers, and stop 2% of the good drivers. (a) There are four key events in this problem. Specify the four key events and define notation for each of them. (b) What is the probability that a randomly selected driver will be stopped at the checkpoint? (c) What is the probability that a driver who is stopped at the checkpoint is drunk?
Answer:
(a) Let the probability drivers are drunk = P(D) = 0.08
The probability that drivers in the area never drink and drive, but are simply bad drivers = P(B) = 0.32
The probability that drivers in the area never drink and drive, and are good drivers = P(G) = 0.60
Let S = event that the police stops the driver.
(b) The probability that a randomly selected driver will be stopped at the checkpoint is 0.2016.
(c) The probability that a driver who is stopped at the checkpoint is drunk is 0.337.
Step-by-step explanation:
We are given that 8% of drivers on New Years' Eve have a blood-alcohol level that is above the legal limit. It is also known that 32% of drivers in the area never drink and drive, but are simply bad drivers. The remaining 60% of drivers never drink and drive and are good drivers.
At this particular checkpoint, the police stop 85% of the drunk drivers, stop 38% of the bad drivers, and stop 2% of the good drivers.
(a) Let the probability drivers are drunk = P(D) = 0.08
The probability that drivers in the area never drink and drive, but are simply bad drivers = P(B) = 0.32
The probability that drivers in the area never drink and drive, and are good drivers = P(G) = 0.60
Let S = event that the police stops the driver
These are the four events stated in the question.
(b) So, the probability that the police stop the drunk drivers = P(S/D) = 0.85
The probability that the police stop the bad drivers = P(S/B) = 0.38
The probability that the police stop the good drivers = P(S/G) = 0.02
Now, the probability that a randomly selected driver will be stopped at the checkpoint is given by = P(S)
P(S) = P(D) [tex]\times[/tex] P(S/D) + P(B) [tex]\times[/tex] P(S/B) + P(G) [tex]\times[/tex] P(S/G)
= (0.08 [tex]\times[/tex] 0.85) + (0.32 [tex]\times[/tex] 0.38) + (0.60 [tex]\times[/tex] 0.02)
= 0.068 + 0.1216 + 0.012
= 0.2016
Hence, the probability that a randomly selected driver will be stopped at the checkpoint is 0.2016.
(c) Now, the probability that a driver who is stopped at the checkpoint is drunk is given by = P(D/S)
P(S/W) = [tex]\frac{P(D) \times P(S/D)}{P(D) \times P(S/D)+P(B) \times P(S/B)+P(G) \times P(S/G)}[/tex]
= [tex]\frac{0.08\times 0.85}{0.08\times 0.85+0.32\times 0.38+0.60\times 0.02}[/tex]
= [tex]\frac{0.068}{0.2016}[/tex] = 0.337
Hence, the probability that a driver who is stopped at the checkpoint is drunk is 0.337.
50
4. 25 and 50
6. 6 and 10
8. 14 and 21
10. 5 and 11
Answer:
What's the question? provide for details
What numbers are a factor of 6?
Answer:
1, 2, 3, 6
Step-by-step explanation:
1*6=6 and 2*3=6
Answer:
The factors of 6 are...1,2,3, and 6
I need help putting these from greatest to least
20.2
2.002
20.02
20
Answer:
2.002, 20, 20.02, 20.2
I am not sure with the answer.
But I think the answer is (20.2>20.02>20>2.002)
Why in the world do people answer questions with non sense
Answer:
I really don't know lol
Step-by-step explanation:
Can you mark me brainliest please :p
Answer:
So that they can get points lol haha
Step-by-step explanation:
Because I know hahaha.
I need help on page 11 I’ll give you brainliest
#7 is B, the trapezoid is reflected across the x axis
#8 is C, unlike D, answer C is still the same shape as triangle A. Answer A is just the same triangle in the same position, can't tell if it moved or not bc it never showed us. B is a reflection, it's flipped.
#9 is D, nothing has changed except it's position; it's been moved to the right
#10 is C, the points of the triangle are at different positions, and it didn't look like it flipped over the x or y axis, so it's reflection. It's also moved to the right, so translation
Hope this helped
ASAP!!!
Han made some hot chocolate by mixing 4 cups of milk with 6 tablespoons of cocoa.
b. How many cups of milk per tablespoon of cocoa is that?
Which expression is equivalent to 2/3 divided by 4/5
What is 40 3/5 - 3/4
Answer:
39.85
Step-by-step explanation:
40 3/5 - 3/4
Find a LCF first:
5*4 = 20
4*5 = 20
The LCF is 20.
40 12/20 - 15/20
812/20 - 15/20
797/20
39.85
Hey there!☺
[tex]Answer:\boxed{39\frac{17}{20}}[/tex]
[tex]Explanation:[/tex]
[tex]40\frac{3}{5}-\frac{3}{4}[/tex]
Evaluate the expression:
[tex]40\frac{3}{5}-\frac{3}{4}=\frac{797}{20}[/tex]
We're not complete because we need to simplify the fraction 797/20:
[tex]\frac{797}{20}=39\frac{17}{20}[/tex]
Hope this helps!☺
Complete the conditional statement.
If -2a > 6, then _____.
a > -3
a > 3
a < 3
a < -3
Answer:
The last one is correct
a<-3
43 • 4-6 = 45 • 4p
pls answer fast
Answer:
83/90
Step-by-step explanation:
43*4=172
172-6=45*4p
166=45*4p
166=180p
166/180=p
83/90=p
Also can I have brainliest!
Lexie wants to earn at least $400 a week. She earns $10 an hour working at a grocery store and $8 an hour working at a restaurant.
Let x be the number of hours she spends working at the grocery store and let y be the number of hours she spends working at the restaurant. Write an inequality that models this situation.
Answer:
10x + 8y ≥ 400
Step-by-step explanation:
x equals the number of hours spent working at the grocery store
she earns $10 an hour thus we use 10x
y equals the number of hours she spends working at the restaurant.
she earns $8 an hour thus we use 8y
10x +8y represent the the money she makes in a week combined.
we use greater the "≥" sign because its an estimate of how much she makes. Lexie might have other sources of income. Finally $400 is about how much she makes from the two jobs a week.
Final answer 10x + 8y ≥ 400
The number of lawns the workers in Angelo’s company have mowed in the first 6 weeks of the summer is 31, 24, 32, 28, 29, and 36. What is the mean absolute deviation for the number of lawns mowed in the first 6 weeks of summer?
Answer: MAD= 3
Step-by-step explanation:
Find the mean of the data set
31+24+32+28+29+36/6= 30
subtract EACH data by the mean, find the absolute value of the answer
31-30= 1 (absolute value)
24-30= 6 (absolute value)
32-30= 2 (absolute value)
28-30= 2 (absolute value)
29-30= 1 (absolute value)
36-30= 6 (absolute value)
Now find the mean of the values
1+6+2+2+1+6/6=3
MAD=3
Gabriel is at the grocery store, and wants to figure out his total cost before he gets to the register. He bought 2.5 pounds of apples that are x dollars a pound and 2 bags of lettuce for y dollars each. Which expressions would represent his total cost? Check all that apply.
Answer:
The answer is D
Step-by-step explanation:
Just answered the question on edge
2 thousandths + 9 ones 5 thousandths =
Answer:
7,009
Step-by-step explanation:
Find the distance between M(-2,3) and N(8,2)
Answer:
[tex]d=\sqrt{101}[/tex]
Step-by-step explanation:
Distance Formula: [tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
Simply plug in your 2 coordinates into the distance formula to find distance d:
[tex]d=\sqrt{(8-(-2))^2+(2-3)^2}[/tex]
[tex]d=\sqrt{(8+2)^2+(-1)^2}[/tex]
[tex]d=\sqrt{(10)^2+1}[/tex]
[tex]d=\sqrt{100+1}[/tex]
[tex]d=\sqrt{101}[/tex]
Help please 34 points
A 96 in. board will be cut into pieces to add a
decorative trim to a rectangular table. The length
of the table is twice the width. All of the board will
be used to add the trim, and the board will be cut
into only four pieces to match the four sides of the
table. Find the location of the cut marks on the
board.
Answer:
16 in, 32 in, 64 inStep-by-step explanation:
Length of the board = 96 in
Size of the pieces:
2(x + 2x) = 966x = 96x = 16Pieces are:
2 off 16 in2 off 32 inCut marks:
16 in, 32 in, 64 inA person driving along the road moves at a rate of 56 miles per hour driven. How far does the person drive
in 1.5 hours?
Answer:
84 miles
Step-by-step explanation:
56 miles = 1 hour
1.5 hour = 84 miles
56/1 * 1.5 = 84
HELP ASAP PLEASEEE
Determine the slope of the line through the given
pair of points (4,-2) and (6,-3)
Answer:
negative one over two is the right answer
Evaluate C = 2pir, for r = 8.
C = 16
C = 10 pi
C = 28 pi
C = 16 pi
The base of this solid crate has an area of 6 square meters. The
height of the crate is 4 meters. What is the volume of the crate?
if the area is 6 that means the square is 2 x 3. 2 x 3 x 4. that equals 24.
let me know how you did !
Answer:24 cubic meters
Step-by-step explanation:
the quotient of 7 subtracted from a number, c, and 4
Answer:
is 2 because 4 plus 3 equals 7 and c equals 3
The mathematical expression of the give algebraic expression is,
⇒ (c - 7) / 4
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The algebraic expression is,
'' The quotient of 7 subtracted from a number, c, and 4''.
Now,
Here, The algebraic expression is,
'' The quotient of 7 subtracted from a number, c, and 4''.
So, We can formulate;
''7 subtracted from a number c'' means that;
= c - 7
So, 'The quotient of 7 subtracted from a number, c, and 4' is written as;
⇒ (c - 7) / 4
Thus, The mathematical expression of the give algebraic expression is,
⇒ (c - 7) / 4
Learn more about the expression visit:
https://brainly.com/question/4344214
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Adair suggests that they package together the fries and soda in a combo for a $0.75 discount. lf the student council pays $0.85 per trench fry and $1.20 per soda, then how much money will they make if they sell 45 combos? (french fries cost $3.50 and soda costs $2.30 normally)
Please answer I will give you the brainliest!
Answer:
$58.50
Step-by-step explanation:
It is given that the student council pays
For per french fry = $0.85
For per soda fry = $1.20
Discount on the combo of fries and soda = $0.75
Total revenue for one combo = $0.85 + $1.20 - $0.75 = $1.30
Since the total revenue for one combo is $1.30, therefore the total revenue for 45 combo is
Total revenue for 45 combo = 45 × $1.30 = $58.50
Therefore, they will make $58.50 if they sell 45 combos.
Answer:
13 :)
Step-by-step explanation:
Rectangle A measures 8 inches by 4 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.
15 inches by 11 inches
6 inches by 3 inches
6 inches by 2 inches
16 inches by 8 inches
10 inches by 5 inches
15 inches by 7.5 inches
10 inches by 6 inches
Answer:
Step-by-step explanation:
Rectangle A measures 8 inches by 4 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.
15 inches by 11 inches
6 inches by 3 inches
18
6 inches by 2 inches
12
16 inches by 8 inches
10 inches by 5 inches
15 inches by 7.5 inches
10 inches by 6 inches
