This experiment is neither the subject nor the researcher because knows which treatment group each subject is in.
What is an experiment?A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
A group of doctors are conducting an experiment to test a new nutritional supplement they randomly selected 600 subjects, assigning 300 subjects to receive the supplement and 300 subjects to receive a placebo.
The doctors are unaware of which subjects are assigned to each treatment group. this experiment is neither the subject nor the researcher because know which treatment group each subject is in.
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The table displays the scores of students on a recent exam. Find the mean of the
scores to the nearest 10th.
Score Number of Students
75
5
80
7
85
7
90
6
95
4
Answer:
84.5
Step-by-step explanation:
multiply score by number of students, add them, divide by total students.
Which equation represents exponential growth?
Answer:
D represents exponential growth.
What is the area of a circle with a diameter of 15. 8cm? To the nearest hundredth
Answer:
see below
Step-by-step explanation:
First we need to find the radius
r =d/2 = 15.8/2 = 7.9 cm
The area of a circle is given by
A = pi r^2
= pi ( 7.9) ^2
=62.41 pi
Using 3.14 for pi
195.9674
To the nearest hundredth
195.97
Using the pi button
196.0667975
To the nearest hundredth
196.07
a theater has 30 rows with 27 seats in the first row, 31 in the second row, 35 in the third row, and so forth. How many seats are in the theater
Answer:
Question relates to a Arithmetic Sequence {30,32,34...} where d = 2
and the terms are the enumber of seats in each row.
S%5Bn%5D=%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29 |Sum of the seats in the 26 rows.
S%5B26%5D=%2826%2F2%29%282%2A30%2B+%2825%292%29 = 1430 seats in the ALL 26 rows
Step-by-step explanation:
Joe wants to make a epecial cleaning mixturefor his hardwood floors. He needs 3/4 cup of vinegar,2/4cup of clorox and 1/4 cups of water. How much cleaner does Joe have when he is finished makeing the mixture?
Answer: 1 1/2.
Step-by-step explanation: Joe is using 3/4 cup of vinegar, 2/4 cup of Clorox, and 1/4 cup of water to make a special cleaning mixture right? He's going to mix all of those ingredients together, which means that this is an addition problem. When we add 3/4, 2/4, and 1/4 cups, we add the numerators to get our answer:
3/4 + 2/4 + 1/4 = 6/4, or 1 2/4, or 1 1/2 cups of cleaner in total when we simplify.
Therefore, the total amount of cleaner he makes is 1 1/2 cups.
Let me know if this is right! :)
MATH
can somebody answer these questions for me??
Answer: a. im not too sure about
B. independent variable is speed, dependent is stopping distance.
C. you already did, just make sure to draw the line connecting the dots!
Step-by-step explanation:
independent variable is one that doesn’t change because of the other variable. dependent changes.
i hope this helps!!
Good afternoon or morning, I need help with this work.
pls make me brainliest and like thnxs :)
Step-by-step explanation:
D is not true
Answer:
A.
i hope these helps :)
Round 21254 to the nearest thousand
Step-by-step explanation:
22000
.
.
.
.
.
is the correct answer
Answer:
21,000
Step-by-step explanation:
254 is less than 500 so you would round downwards. Or you can look at is as 2 (representing the 254) is less than 5 (500)
HELP FIND THE AREA OF PARRELLEGRAM
Answer:
36.36 in^2
Step-by-step explanation:
Base * height
7 * 6 sin 60 = 36.37 units^2
HELP PLS ILL GIVE BRAINLIEST
Which expression is equivalent to v4? Select all that apply.
Group of answer choices
v + v + v + v
v ^3 v
v^2 + v^2
4v
2v ^2
(v) (v) (v) (v)
Answer:
the first one thats v four times so v⁴
the second one v³v combine like terms v⁴
i think thats it
Evaluate if a = 28 and b = -3. a over 4 + b =
Answer:
28
Step-by-step explanation:
a / (4 + b)
(28) / (4 + -3)
(28) / (4 - 3)
(28) / (1)
28
If a = -3, find the value of
a) 2a
b) a^2
c) 3a^2
Answer:
a) -6
b) 9
c) 27
Step-by-step explanation:
[tex]2( - 3) = - 6 \\ { - 3}^{2} = - 9 \\ 3 {( - 3)}^{2} = 27[/tex]
[tex]\textbf{a)}\\\\2a=2(-3) = -6\\\\\textbf{b)}\\\\a^2 = (-3)^2 = 9\\\\\textbf{c)}\\\\3a^2 = 3(-3)^2 = 3 \cdot 9 = 27[/tex]
(a) Joydeep receives a normal hourly wage of $18.60 and time-and-a-half for
any overtime. On public holidays he receives double-time with a minimum
of 4 hours paid. What is his wage for a week in which he works 40 normal
hours,6.5 hours overtime and 3 hours on a public holiday?
Answer:
I'm sorry I don't understand you can give me anything other than math
Math question, me need help
Answer: Idealistically, you can write many numbers here, but for the sake of simplicity, I'll say... -7.60.
Step-by-step explanation: This isn't much in terms of written work, it's more mental math. When we're looking for a number greater than a negtaive number, but it still has to be negative, it will be less than the first number. So, what can be less than -7.81, anything -7.80 and above before you get to -7. The higher the number in the negative scale, the smaller it is. The lower the number on the negative scale, the larger it is. So make the number larger than -7.81, and less than -7.
Solve For x and Solve For y:
Answer: y= 16.97 ×=7.27
Step-by-step explanation:
Click on file for workings
Since it arrived at a zoo, a rhinoceros's weight has increased from 1 1/4 tons to 2 1/4 tons. By what percent has the rhinoceros's weight increased?
Answer:
80 percent increase in weight
Step-by-step explanation:
(2 1/4 - 1 1/4)/ 1 1/4 = 1/ (1 1/4) = .8 80 % increase
what is 2x - 3y + 5z, x = 5 , y = one third, z =3 what does it equal
Answer:
24
Step-by-step explanation:
substitute the given values into the expression
2x - 3y + 5z
= 2(5) - 3([tex]\frac{1}{3}[/tex] ) + 5(3)
= 10 - 1 + 15
= 9 + 15
= 24
Richard wants to purchase one large pizza and some soft drinks for a club meeting. He compares the prices at two restaurants. Each soft drink at the first restaurant has the same price. The table below shows y, the total price of one large pizza and x soft drinks at the first restaurant. At the second restaurant , the total price, y, of one large pizza and x soft drinks can be represented by the equation below: y= 1.5x + 18. Which of the following statements is true?
Answer:
The price of one soft drink is more at the second restaurant than at the first restaurant.
Need ASAP!
What is the exact value of CosA?
Answer:
cos A = 5/8
Step-by-step explanation:
In a right triangle cos ( angle ) = (adjacent side) / (hypotenuse )
so cos A = 5/8
37 A grocery store clerk arranged 72 boxes of pasta on 3 shelves. If he placed the same number of boxes on each shelf, how many boxes did he place on
each shelf?
Answer:
24.
Step-by-step explanation:
The answer to this can be found by dividing 72 by 3.
72 divided by 3 = 24.
What is the area of the semicircle (use 3.14 for p)?
Please help! Will mark brainlyest.
Answer:
127.17 cm²
Step-by-step explanation:
Area of a semicircle: 1/2*π*r²π (pi) = 3.14r (radius) = d (diamater) / 2 => 18/2 = 9 cmA = 1/2*π*r²
A = 1/2*3.14*9²
A = 1/2*3.14*81
A = 3.14*40.5
A = 127.17 cm²
Therefore, the area of the semicircle is 127.17 cm²
Hope this helps!
Answer: the first option: 127.17cm2
Step-by-step explanation:
1. divide the diameter in half to get the radius.
2. multiply the radius squared by pie
3. divide that answer in half
so:
9*9=81
81*3.14= 254.34
254.34/2= 127.17
. In triangle DEF, the measure of angle D is 122º. Angle E is acute, and angle F is 19º. What is the measure of angle F in degrees?
Answer: 19 degrees is your answer
Step-by-step explanation:
please help due in 30 minutes!! This is worth 10 points if I don’t complete it it’s a 0
Answer:
The sum of the three products.
Step-by-step explanation:
Tyesha found that the z-statistic was 2.1 and that the critical z-values were -1.96 and 1.96. Which of the following is a valid conclusion based on these results?
A.One can reject the null hypothesis.
B.One can reject the alternate hypothesis.
C.One can accept the null hypothesis.
D.One cannot accept or reject the null hypothesis.
Answer:
its the blah to the right
Sketch a quadrilateral with no right angles and sides all the same length. What type of quadrillion have you sketched? include your sketch in your answer.
Answer:
A rhombus
Step-by-step explanation:
2 acute and 2 obtuse angles
Answer:
A rhombus
Step-by-step explanation:
I got it correct in school
(sorry I'm late!)
what distance is travelled by a bus that travels at 105kph in 5 hours
Answer:
21mph = 33.80 km/h
Step-by-step explanation:
Speed = Distance / Time = 105 kph / 5 hours = 21 mph = 33.80 km/h
What is the distance traveled by the bus at a speed of 105 kph in 5 hours?
Answer:The distance traveled by the bus is 525 kilometers.
Step-by-step explanation:As per the provided information in the given question, we know that the speed is given by 105 kph. The time is given by 5 hours. In this problem, we are tasked to find the distance traveled by the bus.
To do this, we will use the formula below:
[tex]\large\begin{aligned}\bigstar\:\boxed{\rm{\: Distance = Speed \times Time \:}} \end{aligned}[/tex]
Substitute the given values into the formula given above and solve for Distance:
[tex]\large\begin{aligned}\rm:\implies{Distance}& = \rm{Speed \times Time} \\\rm:\implies{Distance} & =\rm{105\: kph \times 5\: hrs} \\\rm:\implies{Distance} & =\rm{525\: km} \end{aligned}[/tex]
Hence, the distance traveled by the bus is 525 kilometers.
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Will post C later: Transformations, Congruence, and Similarity
Answer:
Answer:
xz=cb = 45/60 = .75
zy=ab = 30/40 = .75
xy=ac = 37.5/50 = .75
Step-by-step explanation:
Step-by-step explanation:
all lines when put into ratio format show .75 scale factor big to little triangle side lengths.
1 fluid once is equivalent to?
proboley like 1/16 of a cup?
You are forming words in which the first letter is either P, B, or M; the second letter is either A or E; and the third letter is either N or T. If each possible word is written on a slip of paper and you choose one slip at random, what is the probability that the second letter is an A?
Using it's concept, it is found that there is a 0.5 = 50% probability that the second letter is an A.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, we consider that:
For the first letter, there are 3 outcomes.For the second letter, there are 2 outcomesFor the third letter, there are 2 outcomes.Hence, the total number of words is:
T = 3 x 2 x 2 = 12.
With the second letter being A, the number of words is:
D = 3 x 1 x 2 = 6.
Hence, the probability is given by:
p = 6/12 = 0.5.
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what is the answer to this equation 4x + 5y =6
Answer:
Step-by-step explanation:
This equation has no solution. You have one equation with two variables, so it cannot be solved. If you have another equation having the same variables x and y, then by using simultaneous equations, values of x and y can be solved. But to this equation 4x + 5y = 6, there is no solution for the reason mentioned above.