On a particularly rainy day the amount of rainfall measured in a rain gauge increased at a
rate of 1.5 inches each hour for 4 hours. What is the total change in the amount of rain that
has fallen after 4 hours?
Roshanda was curious if students in her class would complete a maze faster if fast-paced music was playing in the background. She randomly assigned each student in her class to one of three groups: fast-paced music, slow-paced music, or no music. She timed each student as they individually completed a maze with their corresponding music (or no music) in the background. Students who worked with the fast-paced music, on average, completed the maze significantly faster than students in the other groups.
Can we conclude that the fast-paced music caused her classmates to finish the maze faster? Why?
(A) Yes, because the study included each student in her class
(B) Yes, because the adults were randomly selected
(C) Yes, because the students were randomly assigned to treatment and control groups
(D) Not necessarily, because the sample size was too small
(E) Not necessarily, because this wasn't an experiment
Answer: (E) Not necessarily, because this wasn't an experiment
Step-by-step explanation:
As much as the results would suggest that the fast-paced music was responsible for the faster finishing time, this conclusion cannot be authoritatively made because this was not technically an experiment but rather a test to satisfy curiosity.
An experiment is planned and is scientific. It has more stringent requirements that ensure causation that Roshanda did not meet before she engaged in this trial so we cannot say for a fact that her findings are objective.
Answer: C. yes, the students were randomly assigned to treatment and control groups.
Step-by-step explanation:
A picture-framing shop has the sign shown below in the window.
Frame Sale!
Half Off 17-inch-by-24-inch Frames
A customer has a 4-inch-by-6-inch picture. If the customer wants to enlarge the photograph so that it will come as close as possible to fitting a sale frame, how many times larger should the photo be?
A. 2
B. 3
C. 4
D. 5
E. 13
Answer:
This answer should help it will be in the comments side
Step-by-step explanation:
A baseball and a bat cost 110 dollars. If the bat costs 100 more dollars than the ball, is much does the ball cost
Answer:
$10
Step-by-step explanation:
So the total amount of money needed is $110
And the bat is $100 more than the ball
So basically subtract $100 from $110
And you get $10 So the answer is $10
During her last basketball game, Carmen made 14 field goals out of 30 attempts. What
percent of field goals did she make?
Answer:
46.6666667
Step-by-step explanation:
14/30=0.46666667
*100=46.6666667
round to 46.7%
HELP HELP ME PLEASEEEEEEE
Pls help fast!
Solve the equation.
3x^3+x^2=x^2
Answer:
I believe the correct answer is
X=0
Answer asap please!! Sorry man my computer is mad dirty
Answer:
C. between 4.4 and 4.6Step-by-step explanation:
Because if you add 22 and 8 together you get 30 and once you get 30 you subtract 10 gaining 20 and then you divide 20 getting [tex]2\sqrt{5}[/tex].
22+8= 30
30-10= 20
[tex]\sqrt{20} = 2\sqrt{5[/tex]
Answer:
B
Step-by-step explanation:
If wrong don't rate and I'll edit it
Given the function k(t)=2t-1:
a) evaluate k(2)
b) solve k(t) =7
Answer:
hope it helped have a nice day
Carlos bought a new computer printer for $110.50 and some ink cartridges
for $8.25 each. He spent a total of $176.50.
The equation $176.50 = $110.50 + $8.25c can be used to solve this
problem. Which two mathematical operations do you need to perform in
order to solve the equation for c?
A. addition and multiplication
B. division and multiplication
C. subtraction and division
D. multiplication and subtraction
Write the equation for a line that is parallel to the line y=-1/3x -4 and passes through the point (3, -1)
Answer:
y = -1/3x
Step-by-step explanation:
Since the line has to be parallel, that means it will have the same slope. So, we use the given point and slop to solve for the new y= mx + b using the equation y - y = m( x - x)
m= -1/3 x = 3 y = -1
y + 1 = -1/3(x - 3)
y + 1 = -1/3x + 1
y = -1/3x
Pls help I’ll brainlest ASAP pls
Answer:
p=4
Step-by-step explanation:
Which expression shows a sum of four terms?
A) 4+ x + 4 + x
B) x4
C) 4(x + 4)
D) 4x
answer please quick its due
Answer:
a
Step-by-step explanation:
Pls help I will give thx and give points
Answer:
20
Step-by-step explanation:
you use the pathagorian theorem which is a suqared plus b squared equals c squared.
it would be 12*12 plus 16*16 equals x squared. so 144 plus 256. that equals 400. then you take the square root of it which is 20. therefore x equals 20.
Jose and his family went to dinner at olive garden the total bill was $55.31 Jose decided to leave a 15% tip how much of a tip did the waiter receive
Answer:
The answer would be that waiter will get $8.29.
Step-by-step explanation:
You would do 55.31 multiplyed by 0.15 to get the answer.
Noah has dd dimes and qq quarters. He has no less than 17 coins altogether. Write this situation as an inequality.
Answer:
(dd + qq) ≥ 17
Step-by-step explanation:
We know that the number of coins that we have should be greater than or equal to 17, because it can be no less than 17. So we add dd and qq together, and we say that that sum must be greater than or equal to 17.
NEED THIS IN 10 MINUTES PLEASE
Answer:
5) $82
6) 300
Step-by-step explanation:
If y=x is your linear regression equation, and if x = temperature and y = $ of ice cream sales, then...
5) x = 82, and given that y=x, then y = $82
6) y = $300, and given that y=x, then x = 300
This doesn't really require algebraic calculation, so I wonder if the linear regression equation obtained from the scatter plot is correct.
Look at image to get the questions
Answer:
Step-by-step explanation:
What do you have to do solve it or what
Solve for r 7 = 0.2(r + 3) - -5
Answer:
57 for the way you wrote it. -10 if you write it backwards.
Step-by-step explanation:
Pls help me I will give brainliest
Answer:
Step-by-step explanation:
a^8/c
Answer:
a8
b
10
/c
a^8/c
Step-by-step explanation:
Can I pls get the Brainlist
Mary has $500 in her checking account and she deposits $100 every month. Which inequality can be used to find how many months it will take until she has more than $1,200?
Answer:
igvc
Step-by-step explanation:
uhgisjshsushbebeheuwoowjwjwhausisiskjenensjsiskakejbehsusiakwnhe
Which of the following best describes the graph of the line represented by the table below?
What is the value is x
X=
9514 1404 393
Answer:
x = 10
Step-by-step explanation:
The angle bisector divides the sides proportionally.
(2x +1)/12 = (x +4)/8
2(2x +1) = 3(x +4) . . . . . multiply by 24
4x +2 = 3x +12 . . . . . . . eliminate parentheses
x = 10 . . . . . . . . . . . . . . subtract 2+3x
The person is right because you have to multiply 16 3 times to get your answer I think?
Answer:
um I guess Thank you?
n Happy early valentines Day! to u and ur family and others* p.s Mark me branily and a blessing will come ur way
Step-by-step explanation:
Determine whether each relation is a function. If so, provide the domain and range.
2 4/7 x 1 1/2 ayudapor favor
Answer:
3 6/7 is your correct answer
Step-by-step explanation:
[tex]\huge\text{Hey there!}[/tex]
[tex]\bold{Equation: 2\dfrac{4}{7}\times1\dfrac{1}{2}}[/tex]
[tex]\bold{2\dfrac{4}{7}=\dfrac{18}{7}}\\\\\\\bold{1\dfrac{1}{2}=\dfrac{3}{2}}[/tex]
[tex]\bold{New\ equation: \dfrac{18}{7}\times\dfrac{3}{2}}\\\bold{\dfrac{18\times3}{7\times2}}\\\bold{18\times3=54\leftarrow numerator}\\\bold{14\times2= 14\leftarrow denomination }\\\bold{= \dfrac{54}{14}}\\\bold{The\ GCF (Greatest\ Common \ Factor)\ of\ BOTH\ numbers(54\ \&\ 14)\ is\ 2.}}\\\bold{So, we\ DIVIDE\ both\ numbers\ by\ 2}\\\bold{\dfrac{54\div2}{14\div2}}\\\bold{54\div2=27\leftarrow numerator}\\\bold{\dfrac{14}{2}= 7\leftarrow denominator}\\\bold{= \dfrac{27}{7}}\\\bold{\dfrac{27}{7}= 3\dfrac{6}{7}}[/tex]
[tex]\boxed{\boxed{\bold{ANSWER: \dfrac{27}{7}=3\dfrac{6}{7}}}}\huge\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Quick I need it help
Answer:
8 hours
Step-by-step explanation:
it's increasing by 6 so at the end there's a reminder of 2.
Answer:
7
Step-by-step explanation:
60-16=44
44÷6≈7
How can Help me
(a+b)^2≥4ab
Mark as brainlist___________________________________
Answer:
(a+b) ²≥4ab explanation below↓↓↓↓
Step-by-step explanation:
We know that
(a-b) ²≥0
a²-2ab+b²≥0
Move -2ab to the other side
a²+b²≥2ab
Add 2ab to both sides
a²+2ab+b²≥4ab
(a+b) ²=a²+2ab+b² therefore :
(a+b) ²≥4ab
The prior probabilities for events A1, A2, and A3 are P(A1) = 0.50, P(A2) = 0.20, and P(A3) = 0.30. The conditional probabilities of event B given A1, A2, and A3 are P(B | A1) = 0.50, P(B | A2) = 0.40, and P(B | A3) = 0.20. (Assume that A1, A2, and A3 are mutually exclusive events whose union is the entire sample space.)
Required:
Compute P(B â© A1), P(B â© A2), and P(B â© A3).
Answer:
P( B∩ A₁ ) = 0.25
P( B∩ A₂ ) = 0.08
P( B∩ A₃ ) = 0.06
Step-by-step explanation:
As we know that
P( B∩ A₁ ) = P( B| A₁) × P(A₁)
P( B∩ A₂ ) = P( B| A₂) × P(A₂)
P( B∩ A₃ ) = P( B| A₃) × P(A₃)
As we have
P(A₁) = 0.50, P(A₂) = 0.20, and P(A₃) = 0.30.
P(B | A₁) = 0.50, P(B | A₂) = 0.40, and P(B | A₃) = 0.20
⇒P( B∩ A₁ ) = P( B| A₁) × P(A₁)
= 0.50(0.50)
= 0.25
⇒P( B∩ A₁ ) = 0.25
Now,
⇒P( B∩ A₂ ) = P( B| A₂) × P(A₂)
= 0.40(0.20)
= 0.08
⇒P( B∩ A₂ ) = 0.08
Now,
⇒P( B∩ A₃ ) = P( B| A₃) × P(A₃)
= 0.20(0.30)
= 0.06
⇒P( B∩ A₃ ) = 0.06
∴ we get
P( B∩ A₁ ) = 0.25
P( B∩ A₂ ) = 0.08
P( B∩ A₃ ) = 0.06