Answer:
Step-by-step explanation:
A manufacturer claims that its new hand sanitizer reduces the number of days an average person is sick in a year. To test this claim, a researcher decided to conduct an experiment. The researcher randomly selected 300 people, divided into subject groups by age. Over the course of a year, all the subjects regularly used the hand sanitizer. At the end of the year, the researcher compared the number of days that the subjects in each group were sick.
Which statements about this experiment are true?
Answer:
The study uses blocking and random sampling.
Step-by-step explanation:
The statement with respect to the experiment should be true is that The study uses blocking and random sampling.
What is random sampling?It should be the part of the technique related to sampling where each and every sample should contain equivalent probability of being selected. The sample that should be selected on random basis should be mean to be non-biased with respect to the total population.
hence, The statement with respect to the experiment should be true is that The study uses blocking and random sampling.
Learn more about experiment here: https://brainly.com/question/9882283
Rewrite 8*8*8*8 using an exponent
Answer:
8⁴
Step-by-step explanation:
8*8*8*8 =8⁴
8 exponent 4
Answer:
[tex]8^{4}\\[/tex]
Step-by-step explanation:
An exponent describes how many times the base is repeatedly shown. For instance:
6³
6 is the base and 3 is the exponent. Because the exponent is 3, the base is repeated that many times. Here's what I mean:
6² = 6 (6) (6)
So in 8 (8) (8) (8), the base would be 8 and this is repeated 4 times. So the exponent would be 4.
So your answer would look like [tex]8^{4}[/tex].
Determine whether the set of lengths could form a triangle.
5, 2, and 3.
Answer:
Determine whether the set of lengths could form a triangle 5, 2 and 3. No it can not form a triangle.
Step-by-step explanation:
5 + 2 is greater than 3. 5 + 3 is greater than 2. 3 + 2 is not greater than 5
Answer:
No, the set of lengths - 5, 2 and 3 will not form a triangle.
Step-by-step explanation:
As we know,
The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
[tex]5 + 2 > 3[/tex]
[tex]3 + 5 > 2[/tex]
[tex]2 + 3 = 5[/tex]
Therefore,
it does not satisfy the statement.
Which points are a solution to the graph
Answer:
3,2
Step-by-step explanation:
Find the missing angle measure.
52
Answer:
128
Step-by-step explanation:
Sum of interior angles of a 4 sided quadrilateral is 360.
90 + 90 + 52 + x = 360
232 + x = 360
x = 360 - 232
x = 128
Write an equation that can be used to answer the question. Then solve. Round to
the nearest tenth if necessary.
How high is the ramp?
21 ft
19 ft
Oa h + 192 = 212: 8.9 ft
Ob. 21° - 192 = 12:28.3 ft
Och + 192 = 212; 80 ft
Od. h + 19 = 21; 2 ft
what’s the answer
PLEASE HELP 15 POINTS HURRY!!!!!
Answer:
B. A. D.
Step-by-step explanation:
How do you write 1/9 as a decimal?
Answer:
0.111111111
Step-by-step explanation:
Answer:
0.11
Step-by-step explanation:
The ones are never-ending so if you round it, it is 0.11
Cuál es el problema actual que están viviendo los emprendedores?
Answer:
Los emprendedores se enfrentan a muchos desafíos en el mundo empresarial ultracompetitivo de hoy. Afortunadamente, los emprendedores también tienen más recursos que nunca para abordar esos problemas.
Hoy en día, muchos emprendedores enfrentan los siguientes 10 desafíos. Quizás ya te hayas enfrentado a algunos de ellos. Siga leyendo para saber por qué existe cada desafío y para obtener soluciones y soluciones para que pueda operar su negocio de manera eficiente y exitosa.
can someone please help me find x
Answer:
[tex]2\sqrt{5}[/tex]
Step-by-step explanation:
The picture (attached) shows two isosceles right triangles, so the altitude marked x splits the bottom side in half, 4 units and 4 units.
Each triangle is a right triangle with one leg of length 4, hypotenuse 6. Use the Pythagorean Theorem (leg)^2 + (leg)^2 = (hypotenuse)^2.
[tex]4^2+x^2=6^2\\16+x^2=36\\x^2=20\\x=\sqrt{20}\\x=2\sqrt{5}[/tex]
Please help me with this
Answer:
Its B
Step-by-step explanation:
I got stuck on a question on edge can anyone help?
Answer:
A and D
Step-by-step explanation:
Please help me is this correct ??????
No it is not correct.
is 10x-5=8x-2x + 7 -2 equivalent?
Answer:
2.5
Step-by-step explanation:
Lets simpify one side first
8x - 2x + 7 +2
8-2 = 6
so 6x
7-2 = 5
6x+9
10x - 5 = 6x +5
(You add 5 due to it being negative on the other side)
+5 +5
10x= 6x +10
-6x -6x
4x = 10
Divide each side by 4
x = 2.5 or 10/4 or 5/2
Answer: No
Step-by-step explanation: To find whether these are equivalent, we first need to simplify the equation on the right.
8x-2x+7-2
8x-2x+5 (work- 7-2 = 5)
6x+5 (work- 8x-2x=6x) These are like terms, so we can subtract them
now that we have simplified, let's write the equations once again.
10x-5=6x+5
they are surely not equivalent
Maria is in charge of making punch for the party she adds two quarts of water to 1 quart of orange juice and 2 quarts of mango juice then she adds one quart of crushed strawberry juice and 2 quarts of pineapple juice to the mixture how many quarts of punch does Maria make?
Answer:
8 quarts
Step-by-step explanation:
According to the scenario, computation of the given data are as follows,
Water = 2 quarts
Orange Juice = 1quarts
Mango Juice = 2 quarts
Strawberry juice = 1 quart
Pineapple Juice = 2 quarts
So, Total mixture = Sum of all ingredients in quarts
= 2 + 1 + 2 + 1 + 2 = 8 quarts
Hence, Maria makes 8 quarts of punch.
Triangle GHI is similar to triangle JKL. Find the measure of side JK. Round your
answer to the nearest tenth if necessary.
I
L
7
33
4
H
K
Answer:
Answer:
JK = 18.8
Step-by-step explanation:
7/33 = 4/JK
132 = 7JK
JK = 18.86
Answer:
JK=18.8
Step-by-step explanation:
so we are given that ΔGHI ~ ΔJKL
GI~JL (because corresponding parts of similar triangles are similar)
so GI/JL=ratio of similitude=7/33
GH~JK (corresponding parts of similar triangles are similar)
and GH/JK=ratio of similitude
so:
GH/JK=GI/JL
subsitute known values
4/JK=7/33
cross multiply
7JK=132
divide
JK=132/7
simplify and round
JK≈18.8
hope this helps!
The answers to these questions please
Answer:
Q10 is 13.64 cm3
Q 11 is 221 cm3
Step-by-step explanation:
volume is cross sectional area times height for Q 10
volume is length times width times height for Q 11
Please Help me with this question will mark as Brainllest
Answer:
it is 72
Step-by-step explanation:
3(2z + 3)
= -75
I need help ty
Answer:
= − 1 4
Step-by-step explanation:
Answer:
z = - 14
Step-by-step explanation:
Solving for z using basic algebra
3(2z + 3) = -75
Step 1 distribute the 3
3 * 2z = 6z
3 * 3 = 9
now we have 6z + 9 = -75
step 2 subtract 9 from each side
9 - 9 cancels out
-75 - 9 = -84
now we have 6z = - 84
step 3 divide each side by 6
6z / 6 cancels out
-84 / 6 = -14
we're left with z = -14
a pizza has a radius of 2.5 feet what is the circumference of the pizza
I need a clear answer fast please!!
A movie-theater employee notes an inverse relationship between the theater's popcorn sales
and its nacho sales. On a given night, the theater makes 990 from popcorn sales and
$1,892 from nacho sales. If on the next night the employees sell $1,452 of popcorn, how
much is earned from nachos?
Which is the graph of g(x) = (0.5)x+ 3 – 4?
1
Answer:
It will look like this
Step-by-step
Martha has to learn 208 lines for the school play. If she learns 8 lines every day, how many days will it take her to learn all her lines? PLSSS HELP giving brainliest
Answer:
28 days
Step-by-step explanation:
14. The table shows the survey results of exercises
people do regularly.
Which is true based on the table?
Answer:
Answers in the question are A, B, and E.
The answers to the table are:
yes no total
yes: 12 25 37
no: 12 6 18
total: 24 31 55
Hopefully this helped, sorry if I was too late :)
Giving Brainliest if answer is correct
if x varies directly as y and x=3 when y=15 find the value of x when y=25
Answer:
Step-by-step explanation:
x=5
Answer:
x is 5.
Step-by-step explanation:
X varies directly with y, so we can use the equation x = yk (with k standing for the constant of variation) to find what the constant is. Substitute 3 for x and 15 for y
3 = 15k
Now divide both sides by 15.
3/15 = k
3/15 simplifies to 1/5.
1/5 = k
Now that we know the constant, then what we need to do is find 1/5 of 25 to get x.
1/5(25) = x
Multiply 1/5 by 25 to get 5.
5 = x
The problem is solved.
X will be 5 in this scenario.
12 is what
% of 200?
Answer: 6%
pls give me brainliest ty
Step-by-step explanation:
69420-69420x69420+69420-69420 69420-69420x69420+69420-69420
Answer:
0 i think
Step-by-step explanation:
Answer:
The answer is -69,420 ! 69,420 - 69,420 = 0. next you multiply it and its 0 again then you add it 69,420 then subtract it equals 0 then subtract again it equals -69,420 then multiply it equals -69,420 then you have to add 69,420 it equals 0 again then you subtracted 69,420 and that means its -69,420!
Step-by-step explanation:
solve this please .......
Answer:
The sum of reciprocals is 2/3.
You don't need complex numbers to solve this, but if you try to find a and b you will need complex numbers.
Step-by-step explanation:
a+b = 2
a*b = 3
1/a + 1/b = x
(a*b)*(1/a + 1/b) = (a*b)x
b + a = (a*b)(x)
2 = 3x
x = 2/3
b = 2 - a
a*(2 - a) = 3
-a^2 + 2a = 3
-a^2 + 2a - 3 = 0
a^2 - 2a + 3 = 0
let's solve the quadratic equation
a^2 - 2a + 3 = a^2 - 2a + 1 + 2 = (a - 1)^2 + 2 = 0
(a - 1)^2 = -2
[tex]a_1 - 1 = \sqrt{2}i\\a_1 = 1+\sqrt{2}i\\\\a_2 - 1 = -\sqrt{2}i\\a_2 = 1 - \sqrt{2}i\\[/tex]
these options correspond to a and b from the original question.
Segment AB, with endpoints A(-6,9) and B(12, -3), is dilated by a scale factor of 2/3 centered at the origin.
What are the coordinates of A'?
Enter your answer as an ordered pair, using parentheses and a comma, like this: (42,53)
The coordinates of A' after the dilation is (-4,6)
How to determine the coordinates of A'?The given parameters are:
A = (-6,9)
B = (12, -3)
Scale factor, k = 2/3
The coordinates of A' is then calculated as:
A' = A * k
This gives
A' = (-6,9) * 2/3
Evaluate the product
A' = (-4,6)
Hence, the coordinates of A' after the dilation is (-4,6)
Read more about dilation at:
https://brainly.com/question/3457976
What is the standard form of the nymber 6.7321 * 108?
A. 6,732,100,000
B. 673,210,000
C. 67,321,000
D. 6,732,100
Answer:
673,210,000
Step-by-step explanation:
The given number is :
N = 6.7321 × 10⁸
We need to write it into the standard form.
10⁸ = 100000000
It can be calculated as follows :
6.7321 × 100000000 = [tex]\dfrac{67321 }{10000}\times 100000000[/tex]
= 673,210,000
So, the standard form of the given number is 673,210,000. Hence, the correct option is (c).