Answer:
a:b = 100:1
Step-by-step explanation:
Given:
a is 100% more than b
Find:
a:b
Computation:
Assume;
Common multiply = p
So,
b = p
a = 100P
a:b = 100p : p
a:b = 100:1
To test the effectiveness of an exercise program in reducing high blood pressure, 15 participants had their blood pressures recorded before beginning the program and again after completing the program. The difference (after minus before) in blood pressure was recorded for each participant, and the sample mean difference was calculated. A hypothesis test will be conducted to investigate whether there is convincing statistical evidence for a reduction in blood pressure for all who complete the program. Which of the following is the correct set of hypotheses?
A. H0 : bar xD = 0
Ha : bar xD is not equal to 0
B. H0 : bar xD = 0
Ha : bar xD > 0
C. H0 : mu D = 0
Ha : mu D is not equal to 0
D. H0 : mu D = 0
Ha : mu D > 0
E. H0 : mu D = 0
Ha : mu d < 0
Answer:
E.
H0 : mu D = 0
Ha : mu d < 0
Step-by-step explanation:
The hypothesis is to test if there is a reduction in blood pressure for those who complete the program, this means if the mean difference in blood pressure (that is after - before) is less than 0. Here, the hypothesis is the alternative side while the opposite, that is, there is no difference in blood pressure before and after is the null.
This means :
H0 : μD = 0
Ha : μD < 0
You can use the definitions for null and alternate hypotheses
The correct set of hypothesis is given by:
Option E. [tex]H_0: \mu_D = 0[/tex]
[tex]H_a: \mu_D < 0[/tex]
How to form the hypotheses?There are two hypotheses. First one is called null hypothesis and it is chosen such that it predicts nullity or no change in a thing. It is usually the hypothesis against which we do the test. The hypothesis which we put against null hypothesis is alternate hypothesis.
Null hypothesis is the one which researchers try to disprove.
How to find the correct set of hypothesis for the given situation?Since the test is to test the effectiveness of the exercise program, thus the wish of the tester is to get the result that effectiveness is there. This will be the alternate hypothesis and the null hypothesis will be that there is no difference in the blood pressure before and after the exercise. Thus, we will test against the null hypothesis.
Since the evidence is to be found for all of the people who completed the program, thus it is hypothesis about population perimeter. The average blood pressure difference of the population is denoted by [tex]\mu_D[/tex] and that of the sample is denoted by [tex]\overline{x}_D[/tex]
Thus, we have:
Null hypothesis = the difference in average blood pressure before and after the program of the population is not changed(thus 0 is the difference) = [tex]H_0: \mu_D = 0[/tex]
Alternate hypothesis = the difference in average blood pressure is reduced(since the test is for seeing if the blood pressure is reduced or not) = [tex]H_a: \mu_D < 0[/tex]
Thus,
The correct set of hypothesis is given by:
Option E. [tex]H_0: \mu_D = 0[/tex]
[tex]H_a: \mu_D < 0[/tex]
Learn more about null and alternative hypothesis here:
https://brainly.com/question/18831983
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Answer:
alternate exterior
Step-by-step explanation:
a circle with the diameter of 40 inches. what is the area?
Answer:
A= 1256
Step-by-step explanation:
The formula for area of a circle is [tex]A=\pi r^{2}[/tex]
1. Diameter is DOUBLE of radius, so the diameter must be divided by 2. 40/2 = 20.
2. Then, plug in the values into the area formula. A= 3.14[tex](20^{2})[/tex]
3. Solve. A= 1256. (Remember that 20 squared is 20x20)
e/2 < -1 I need help!!! Ty
Answer: you cant solve this solution
Step-by-step explanation:
It takes Steven 12.25 minutes to run 1.4 miles. At this rate. how long will it take him to run 2.6 miles?
The speed is the distance covered by an object at a particular time. The time it will take for Steven to cover a distance of 2.6 miles is 22.75 minutes.
What is speed?The speed is the distance covered by an object at a particular time. Therefore, it is the ratio of distance and time.
Speed = Distance / Time
Given that it takes Steven 12.25 minutes to run 1.4 miles. Therefore, the rate or speed at which Steven runs is,
Speed = Distance / Time
Speed of Steve = 1.4 miles / 12.25 minutes
Now, if at the same rate Steven runs, then the time it will take for Steven to run a distance of 2.6 miles is,
Speed = Distance / Time
Time = Distance / Speed
Time = 2.6 miles / (1.4 miles / 12.25 minutes)
Time = (2.6 miles × 12.25 minutes)/1.4 miles
Time = 22.75 minutes
Hence, the time it will take for Steven to cover a distance of 2.6 miles is 22.75 minutes.
Learn more about Speed here:
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What is the equation for the line in slope intercept form
Answer:
y = 12x + 6
Step-by-step explanation:
y-intercept (c)= 6
m= 12
therefore, y=mx+c
y=12x + 6
Help meeee pleaseeeeeeee I need to pass my homework
First, you replace c and d. You would end up with[tex]\frac{1}{4}[/tex] (6) + 3(7).
Then, you evaulate it. You end up with [tex]1\frac{1}{2}[/tex] + 21.
Lastly, you add them together. The final answer is [tex]22\frac{1}{2}[/tex].
Hi there!
Simplifly c and d:
c=6, d=7
Multiply terms by terms:
[tex]\frac{1}{4}[/tex]·[tex]6=1\frac{2}{4}[/tex]
[tex]3[/tex]·[tex]7=21[/tex]
Add all terms together:
[tex]1\frac{2}{4}+21=22\frac{2}{4}[/tex]
Simplifly terms:
[tex]22\frac{2}{4}=22\frac{1}{2}[/tex]
Final Result: [tex]22\frac{1}{2}[/tex]
help please!!!!!!!!will give brainliest
Step-by-step explanation:
The first answer is correct
Answer:
The answer is option A = 5 11/36
Working :
3 8/9 as an improper fraction = 35/9
1 5/12 as an improper fraction =17/12
35/9 + 17/12 = 191/36
=5 11/36
Please mark me brainliest.
Tripp swims 50 laps a day in
hopes of becoming a collegiate
swimmer. Write an equation to
represent y, the total number of
laps Tripp has swam after x
days.
Answer:
y = 50x
Step-by-step explanation:
Match the event with the most appropriate probability word: The roll
a standard fair dice will show the square root of 49.
Impossible
Unlikely
Certain
Evens
Likely
Other:
Answer:
Impossible
Step-by-step explanation:
Impossible is the answer as the root of 49 is 7 and dice has numbers up till six only
Of the people who fished at Clearwater Park today, 81 had a fishing license, and 9 did not. Of the people who fished at Mountain View Park today, 60 had a license, and 40 did not. (No one fished at both parks.) Suppose that one fisher from each park is chosen at random. What is the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license? Do not round your answer.
Answer:
9/25 = the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license
Step-by-step explanation:
There are 90 fishers at Clearwater and 100 fishers at Mountain View
The probability of a fisher at Clearwater had a license = 81/90 = 9/10
and the probability of a fisher at Mountain View
did not have a license = 40/100 = 2/5
the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license = 9/10(2/5) = 9/25
what is the system of linear equation by graphing? 2x + 3y=16.9
5x=y + 7.4
Answer:
6366336363721.0122112222%
What would be the y- intercept for the function y=3x-6?
Answer:
the y intercept would be at (0,-6)
Faucet A can fill up a water cooler in 8 minutes. Faucet B can fill the same water cooler in 12 minutes. How long will it take both faucets together to fill the water cooler?
!!!!!Explanation Needed!!!!!
Answer:
A cold water tap takes 3 minutes to fill the bath. A hot water tap takes 2 minutes to fill the bath. How long does it take to fill the bath when both taps are open at the same time?
It is easiest just to let the bath be a given size.
My little bath will be 12 litres
cold water 4L/min hot water = 6L/min
together 10L/1 min
10*(12/10) L per 1*(12/10) minutes
12L per 1.2min
12L per 1min and 12sec
It will take 1 minute and 12 seconds to fill the bath.
Step-by-step explanation:
Answer:
It will take 5 minutes for both faucets together to fill the water cooler
Step-by-step explanation:
I'm kinda just guessing but I do have a reasonable explanation
So the average time it takes for the faucets INDIVIDUALLY to fill the water cooler is 10 minutes
But since both faucets are filling them TOGETHER, it should take half the time
And half of 10 is 5
So it should take 5 minutes for both faucets together to fill the water cooler
If that makes sense
Fresh Mart buys a bushel of apples for $3.50 and sells it for $12.50. What is the
percent of increase in price? Round to the nearest whole number. What is the
dollar amount of Fresh Mart's profit?
Answer:
12%
Step-by-step explanation:
Answer:
Step-by-step explanation:
x% of 3.50 = 12.50
x% = 12.50/3.50 ≅ 3.57 = 357%
price increased by 357%
profit = 12.50 - 3.50 = $9
Convert the following angle from degrees to radians. Express your answer in simplest form. 210°
Answer:
Step-by-step explanation:
[tex]\frac{rad}{\theta}=\frac{\pi}{180}\\ \\ rad=\frac{\theta \pi}{180}\\ \\ rad=\frac{210\pi}{180}\\ \\ rad=\frac{7\pi}{6}[/tex]
5. A length of rope is 20m long. If I cut it into 10 equal length pieces, how long is
each piece? *
what is given
Answer:
each piece is = 3 m long
Step-by-step explanation:
20 /10= 2
What is the fraction form of Sin 50° ÷ Sin 30°
Answer:
my insta is _luhbhabie_
Step-by-step explanation:
I need help with graphing
Ok I can help you with graphing
what is the anwser pls help
Answer:
b. 0.09
Step-by-step explanation:
0.09 is the only one smaller than 0.59
0.59>0.09
Answer:Its D
Step-by-step explanation:
10^(x-2)=1000 Show or explain your reasoning.
Answer: x=5 trust me it right
Step-by-step explanation: hope this help:D
I don’t have time to explain bc I have work to do.
2. The rates of currency exchange published in the newspaper on a certain day showed that 12 pounds co
be exchanged for 96 dollars. How many dollars could be obtained for 102 pounds?
[2.5
CURRENCY URANG
Answer:
Step-by-step explanation:
Your answer
816 dollars
Mark it as Brainlist answer. Follow me.
Given the function rule f(x) = x2 - 5x + 1, what is the output of f(-3)? (1 point)
7
-5
25
5
Please help, ill give brainiest
A penny is dropped from the top of a new
building. Its height in feet can be modeled by
the equation y = 256 − 16x2, where x is the
time in seconds since the penny was dropped.
How long does it take for the penny to reach
the ground?
Answer:
4? I could be wrong. Sorry.
Step-by-step explanation:
A total of 560 tickets were sold
They were either adult or Student
tickets.
The number of Student tickets
Sold was 3 times the number of
adult tickets. How many adult
tickets sold
Answer:
Student.... 420
Adult.......140
Which angles are complementary to each other?
5
25 and 23
25 and 24
21 and 22
21 and 24
Hello, I need help!!!!?
Identify the sampling technique used. Thirty-five sophomores, 24 juniors and 25 seniors are randomly selected from 388 sophomores, 418 juniors and 573 seniors at a certain high school. systematic random convenience O cluster stratified
y = -2x in standard form
Answer:
2x+y=0
Step-by-step explanation:
−3xy ^5 (8y) Simplified
