Answer:
$88.
Step-by-step explanation:
Do 22 * 4, your answer should be 88.
The Correct Answer: $88
The time needed for all college students to complete a certain paper-and-pencil maze follows a normal distribution with a population mean of 30 seconds and a population standard deviation of 3 seconds.
You wish to see if the mean time μ (where μ stands for population mean) is changed by vigorous exercise, so you have a group of nine college students exercise vigorously for 30 minutes and then complete the maze. It takes them an sample average of 31.2 seconds to complete the maze. Use this information to test the hypotheses:
H0: μ = 30,
Ha: ≠30
at the significance level of 0.01.
You conclude:
a) There is not enough evidence to support the claim.
b) There is enough evidence to support the claim.
Answer:
The correct option is a
Step-by-step explanation:
From the question we are told that
The population mean is [tex]\mu = 30\ seconds[/tex]
The standard deviation is [tex]\sigma = 3 \ seconds[/tex]
The sample size is n = 9
The null hypothesis is [tex]H_o: \mu = 30[/tex]
The alternative hypothesis is [tex]H_a : \mu \ne 30[/tex]
The level of significance is [tex]\alpha = 0.01[/tex]
The sample mean is [tex]\= x = 31.2[/tex]
Generally the test statistics is mathematically represented as
[tex]z = \frac{ \= x - \mu }{ \frac{\sigma}{\sqrt{n} } }[/tex]
=> [tex]z = \frac{ 31.2 - 30}{ \frac{3}{\sqrt{9} } }[/tex]
=> [tex]z = 1.2[/tex]
From the z table the area under the normal curve to the right corresponding to 1.2 is
[tex]P(Z > 1.2) = 0.11507[/tex]
Generally the p-value is mathematically represented as
[tex]p-value = 2 * P(Z > 1.2)[/tex]
=> [tex]p-value = 2 *0.11507[/tex]
=> [tex]p-value = 0.230[/tex]
From the value obtained w can see that
[tex]p-value > \alpha[/tex] hence
The decision rule is
Fail to reject the null hypothesis
The conclusion is there is not enough evidence to support the claim
How to estimate the quotient of 49.3 divided by 6
What is the sum of -2/6 and 3/2?
A. -11/6
B. -7/6
C. 7/6
D. 11/6
Answer:
c. 7/6
Step-by-step explanation:
Answer:
C. 7/6
Step-by-step explanation:
I was doing the math and the same question came up for my kid and when my kid turned it in My kid got it right so C is correct
This is urgent PLEASE help me
Answer:
at -6
Step-by-step explanation:
hope that help
what is the slope i cannot find the answer to this slope please help?
Answer:
a slope is that
Step-by-step explanation:
arrow a slope the diangnle one
HELP ILL MARK BRAINLIEST
1. Calculate...
a) Using Long Division show your work.
(-6x – 5 + x4 + 4x3) - (x2 – 8)
Answer:
its 85
Step-by-step explanation:
A certain plant grows 1 1/6
inches every week. How long will it take the plant to grow 4 1/6
inches? IN WEEKS
Answer:
4 weeks
Step-by-step explanation:
1 1/6 every week x 4weeks = 4 1/6
Answer:
About 4 weeks
Step-by-step explanation:
x = 1 1/6w
4 1/6 = 1 1/6w
25/6 = 7/6w
6/7 x 25/6 = 7/6w x 6/7
150/42 = w
3.57142857143 = w
w ≈ 4
For the parallelogram shown below, find coordinates for P without using any new variables.
Answer:
The answer is B
Step-by-step explanation:
Multiply 8.88 x 10 . Explain the shift of the digits and the change in the value of each digit.
Answer:
Since it is multiplied by ten, its basically multiplying 8.88 by 1 and moving the decimal to the right once. Multiplying numbers by 10s, 100s etc. means you have to shift the decimal point to the right based on a number of zeros multiplied.
Step-by-step explanation:
Hope I helped u!!!
Help me out please!!!
what is the square root of 325698
how to take pictures?
Answer:
when you first go on to brainly it should say scan if you are on a chrome book it doesn't work
Step-by-step explanation:
find the slope given the points (3 2) and (4 7)
Answer:
5
Step-by-step explanation:
slope = (y₂ - y₁) / (x₂ - x₁)
= (7 - 2) / (4 - 3)
= 5 / 1
= 5
The slope of the line passing through the points (3 2) and (4 7) is 5
The formula for calculating the slope of a line passing through the point (3 2) and (4 7) is expressed as:
[tex]m=\frac{y_2-y_1}{x_2-x_1} \\m=\frac{7-2}{4-3}\\m=\frac{5}{1} \\m=5[/tex]
Hence the slope of the line passing through the points (3 2) and (4 7) is 5
Learn more here: https://brainly.com/question/12922257
Kiran reads 5 page in 20 minutes. He spends the same amount of time per page. How long will it take him to read 11 pages?
What is the area of a triangle with 2 ft by 2 ft
Answer:
A=hbb
2
Step-by-step explanation:
Answer:
If the base is 2 and the height is 2, the area is 2
Step-by-step explanation:
Please help me I do not understand this!
Answer:
35
Step-by-step explanation:
70 time 0.5
1. multiply 7 times 5 which equals 35
2. move decimal one time because have a zero in 70
3. your answer is 35
if need help i am here plz ask questions if needed
Answer:
35
Step-by-step explanation:
A boat takes 2 hours to travel 15 miles upriver against the current. If the rate of the boat in still water is 13 miles per hour what is the rate of the current?
Answer:
The rate of the current is 5.5 miles per hour
Step-by-step explanation:
Relative Speeds
The boat takes 2 hours to travel 15 miles upriver against the current. The speed is 15/2 = 7.5 miles per hour.
Since the boat in still water can travel at 13 miles per hour, it means the current subtracts its speed from the speed of the boat:
Vcurrent = 13 mi/h - 7.5 mi/h
Vcurrent = 5.5 mi/h
The rate of the current is 5.5 miles per hour
If x=-2 is a solution to the equation f(x)=g(x) which of these statements must be true?
A) The graphs of f and g intersect each other at x=-2.
B) The graphs of f and g intersect each other at x=2.
C) The graphs of f and g intersect the x-axis at -2.
D) The graphs of f and g intersect the y-axis at -2.
Answer:B
Step-by-step explanation:I didn’t the test
Trust me
Answer: B
I found out once i finished the test
I have no idea how to do this help me please
Answer:
(2,9) (4,9) (6,10) (8,11)
Step-by-step explanation:
X is the input. Y is the output. In an ordered pair (X, Y) we must match the inputs and outputs based off the arrows. We see that the 2 in the input section points to the 9. This signifies an ordered pair. From this, we can graph these points.
Which number is the additive inverse of -5?
-1/5
O
1/5
5
Answer:
the answer is 5
Step-by-step explanation:
*additive inverse of a number is the number that when added to its original number yields to zero. the number is also known as the opposite or negation
let the additive inverse be = x
-5 + x = 0
x = 0 + 5
x = 5
the additive inverse of -5 is 5
Answer:5
Step-by-step explanation: I can’t really explain it to you but I just know I got you guys
A freight train traveled 80 miles in 5 hours at a constant speed , how many miles did the freight train travel per hour
complete the identity
sin 2x - cot x
Answer:
Solve the scientific Calculator
what TWO expressions equal 12−(−33) ?
Answer:
12+33 and 33 - (-12)
Step-by-step explanation:
12 - (-33) = 45
12 + 33 gives us 45
33 - (-12) gives us 45
CAN YOU HELP ME PLEASE I NEED THIS RIGHT NOW I DONT UNDERSTAND
Answer:
divide the smaller number by the larger number
Step-by-step explanation:
54.8% or 55%
what is 2+1 and explain ur answer
The volume V in liters of air in the lungs during a five- second respiratory cycle is approximated by the model V= 0.1724t+0.1523t^2-0.0377t^3 where t is the time in seconds. Approximate the average volume of air in the lungs during one cycle. Round your answer to four decimal places.
Answer:
[tex]\frac{\int\limits^5_0 {0.1724t+0.1523t^2-0.0377t^3} \, dt }{5-0} = 0.522[/tex]
Step-by-step explanation:
as with all functions f(t), the average value on [a,b] is
[tex]\frac{\int\limits^b_a {f(t)} \, dt }{b-a}[/tex]
Choose the graph of the equation 4x + 3y = –24.
Answer:
the slope intercept form of the equation is y= - [tex]\frac{4}{3}[/tex]x -8
so the correct graph will be going negative from left to right, and will go through the point (0,-8)
Help ASAP I’m bad at math lol,Solve for d
it is -16 because I took the test
PLEASE PLEASE PLEASE HELP
Answer:
a)
Growth rate 0.075
Growth factor 1.075
b) 59177 or approx 60000
Step-by-step explanation:
I love these kind of question where we get to model equations :D So lets get started.
a)
The population of a city after t years after 2010 is given by
[tex]P=20000(1.075)^t[/tex]
The original exponential growth formula is:
[tex]y=a(1+r)^t[/tex]
so we can write our equation in this form as well:
[tex]P=20000(1+0.075)^t[/tex]
the growth factor is 1+r which is 1+0.075 which is 1.075
the growth rate is determined by the value of r which is 0.075
b)
Since our equation represents the population of a city after the year 2010 we can use it to further calculate the population in 2025 so
2025 - 2010 = 15
we set the value of t in our equation to 15 which is in years,
[tex]P=20000(1.075)^{15}\\P=59177[/tex]
so we can say that our population in 2025 would be approximately 60,000
need help with this
//////////////////////////
Answer:
C
Step-by-step explanation:
HOPE THIS HELPED !! :D
Answer:
[tex] \frac{5}{6} \: of \:\frac{-4}{15} \\ \frac{5}{6} \times \frac{ -4 }{15} \\ \: \boxed{\frac{ - 2}{9} }[/tex]
3) -2/9 is the right answer.