Answer:
This is a rectangle
Step-by-step explanation:
2D shape with 4 right angles would be a rectangle because 2 sides are equal and the other 2 would be equal to give you 4 right angles
What is the difference between a sample and a population?
Answer:
A population is the entire group that you want to draw conclusions about. A sample is the specific group that you will collect data from. The size of the sample is always less than the total size of the population
Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of time required for bodily absorption of brand A and brand B headache remedies. Twelve people were randomly selected and given an oral dose of brand A and another 12 people were randomly selected and given an oral dose of brand B. The lengths of time in minutes for the drugs to reach a specified level in the blood were recorded. The mean and standard deviation for brand A was 21.8 and 8.7 minutes, respectively. The mean and standard deviation for brand B was 18.9 and 7.5 minutes, respectively. Past experience with the drug composition of the two remedies permits researchers to assume that both distributions are approximately Normal. Let us use a 5% level of significance to test the claim that there is no difference in the mean time required for bodily absorption.
Required:
Find or estimate the p — value of the sample test statistic.
Answer:
[tex]t = 0.875[/tex]
Step-by-step explanation:
Given
Brand A Brand B
[tex]n_ 1= 12[/tex] [tex]n_2 = 12[/tex]
[tex]\bar x_1 = 21.8[/tex] [tex]\bar x_2 = 18.9[/tex]
[tex]\sigma_1 = 8.7[/tex] [tex]\sigma_2 = 7.5[/tex]
Required
Determine the test statistic (t)
This is calculated as:
[tex]t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}[/tex]
Calculate s using:
[tex]s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}[/tex]
The equation becomes:
[tex]s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}[/tex]
[tex]s = \sqrt{\frac{1451.34}{22}}[/tex]
[tex]s = \sqrt{65.97}[/tex]
[tex]s = 8.12[/tex]
So:
[tex]t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}[/tex]
[tex]t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}[/tex]
[tex]t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}[/tex]
[tex]t = \frac{21.8 - 18.9}{8.12 * 0.408}}[/tex]
[tex]t = \frac{2.9}{3.31296}}[/tex]
[tex]t = 0.875[/tex]
plss help me plsssssss I've been 24 hours studiyng right now soo please help me
Answer:
1)b 0.48
2) c 0.35
3) a 0.092
4) d 51.2
5) a 4
6) b0.6
7) d 3
8) a 3.33
9) a 37.125
10) c 9.1
a. A bag contains 6 blue marbles, 8 black marbles, and 9 yellow marbles. If a marble is drawn from the bag, replaced, and another marble is drawn, what is the probability of drawing first a b l u e marble and then a y e l l o w marble? 0.1021 Correct b. A bag contains 8 g r e e n marbles, 9 y e l l o w marbles, and 6 b l a c k marbles. If two different marbles are drawn from the bag , what is the probability of drawing first a g r e e n marble and then a b l a c k marble?
help me I'm really swamped
{H,o,n,l,u}
Just take away all the duplicate letters and voila. funny that i did that question yesterday.
Write 24:14:6 in its simplest form.
Answer:
12 : 7 : 3
Step-by-step explanation:
24 : 14 : 6
12 : 7 : 3
Always start with smaller number to simplify it. Since 2 is the smaller number and it simplifies 24, 14, and 6 I start with it.
24 ÷ 2 = 12
14 ÷ 2 = 7
6 ÷ 2 = 3
We would stop here since it would not further simplify, therefore our answer is 12 : 7 : 3.
Hope this helps, thank you :) !!
Line k is the perpendicular bisector of pq and point r which of the following statements must be true?
Answer:
question incomplete.
Step-by-step explanation:
Michael has a toy car collection. He keeps 78 of the toy cars on his wall, which is 39% of his entire collection. What is the total number of toy cars in Michael's collection?
Answer:200
Step-by-step explanation:
39 divide by 13= 3, 78 divided by 13=6.
So 3% is 6 and 1% is 2 so 1*100= 100 and 2*100= 200.
x in 5xy = 10 to solve the system
below.
x = 25 - y
5x + y =10
Answer:
Step-by-step explanation:
there are two ways to solve systems of equations, elimination or substitution, this looks like elimination would work quickly
x= 25 -y
x + y = 25 (eq 1)
5x + y = 10 (eq 2)
subtract 2 from 1
x + y = 25
-(5x + y = 10)
-4x + 0y = 15
-4x = 15
x = - 15/4
now plug in x into either starting equations and solve for y
-15/4 + y = 25
y = 25 + 15/4
y = 100/4 + 15 /4
y = 115 /4
y = 28 3/4
we have solved it :)
Answer:
5x+ y = 10 ---(eq1)
x = 25 - y ---(eq2)
substituting (eq2) in (eq1)
5(25 - y) + y = 10
125 - 5y + y = 10
125 - 4y = 10
-4y = 10 - 125
-4y = -115
4y = 115
y = 115/4 = 28.75
substituting value of y in (eq2)
x = 25 - 28.75
x = -3.75
-4.5t + 11.75 = 20.75
WITH STEPS
w(n)= -n-2; Find w(10)
Answer: w(10) = -12
Step-by-step explanation:
w(n) = -n - 2; Find w(10)
w(10) = -(10) - 2
w(10) = -10 - 2
w(10) = -12
Please help me to come up with an equation for x.
Answer:
100=x+60
Step-by-step explanation:
Hey There!
So the angle that has a value of 100 is equal to angles x and the angle that is equal to 60
so an equation to solve for x could be
100=x+60
Find two numbers that multiply to give 48
and have a difference of 8.
a guy wire runs from the top of a tree Point 42.5 ft from its base if the angle of elevation from the ground on top of the tree is 35.3 degrees find the length x of The Wire
Answer:
[tex] \cos(35.3) = 0.8141 \\ \cos(35.3) = \frac{42.5}{x} \\ 0.8141 = \frac{42.5}{x } \\ x = \frac{42.5}{0.8141} = 52.20 \: ft[/tex]
What is quarter of 25???
And) What is 1/2 of 16 ?
Answer:
quarter of 25 => 25/4=6.25
1/2 of 16= 8
What is the remainder to the following polynomial division problem?
(x^2+ 6x + 5) / (x + 2)
Answer:
I think it is -3
Step-by-step explanation:
x+4-(3/x+2) is the answer I got
HELPPPPPPPPPPPP PLEASEEEEEEEEEEEEEEEEEEEEEEEEE
Dalton's dad rode his bike 1 kilometer north, 2 kilometers west,
1 kilometer south, and 2 kilometers east. Dalton rode the same path
5 times. How many kilometers farther did Dalton ride?
Answer:
24
Step-by-step explanation:
Simplify this fraction: 9/33
Answer:
3/11
Step-by-step explanation:
Both numbers are easily simplified by 3 and that's as far as it can go because 11 is a prime number
9÷3=3
33÷3=11
3/11=9/33
Answer:
3/11
Step-by-step explanation:
Find the GCD (or HCF) of numerator and denominator
GCD of 9 and 33 is 3
Divide both the numerator and denominator by the GCD
9 ÷ 3
33 ÷ 3
Reduced fraction: 3/11
9/33 simplified gives you your answer which is 3/11
Plz help ASAP 20 points 10. What is the equation of a circle with radius, r = 4, and the center at (0,0)?
A.X² + y² = 4
B.22 + y2 = 16
C.2 - 4)+ (y – 4) = 4
B.(.2 - 4)? + (y – 4)2 = 16
Answer:
a
Step-by-step explanation:
the equation for a circle centered at orgin is x^2+y^2=r where r is the radius. multiplying, adding, or subtracting any numbers to the x and y components such as the other choices here causes the circle to be translated about the graph.
Find the area of each figure. Round to the nearest tenth if necessary
Answer:
59.3
Step-by-step explanation:
First find the area of the the right triangles
5 * 4 / 2 = 10
Multiply it by 2 since there are 2 right triangles that are the same
10 * 2= 20
Then find the area of a semi circle
The radius is 5
π5^2 / 2= 39.27
39.27 rounded to the nearest tenth is 39.3
Add them together
20 + 39.3 = 59.3
59.3 is your answer
A company made $785 in a ticket sale they sold 100 tickets how much did the company make per ticket if each ticket cost the same price
A graph is shown in the picture. Which root has the multiplicity of 3?
There are five boys and three girls in a swimming pool. If two people are selected at
random with replacement, find the probability that both are girls?
Answer:
its a 3/8 chance that there are girls
Step-by-step explanation:
Can someone help me? I’ll reward 10 points + brainalist
Answer I got:
I got approximately 0.34906585039 in².
Step-by-step explanation:
So we know that [tex]A=\pi r^{2}[/tex]. We also know that [tex]r=\frac{1}{3}(0.3333...)[/tex] in. So, we can place this into our equation:
[tex]A=\pi\times\frac{1}{3}^{2}(A=\pi\times0.33333...^{2})[/tex]
Finally, we know that [tex]\pi\approx\frac{22}{7}[/tex].
[tex]A\approx\frac{22}{7}\times\frac{1}{3}^{2} (A=3.1415926...\times 0.3333333...^{2})[/tex]
This gave my final approx. answer of 0.34906585039 in².
[tex]\pi\frac{1}{3}^{2}\approx 0.34906585039[/tex]
All you need to do now is find the corresponding fraction to that!
150 students were surveyed to see what sport they play what percentage plays soccer
Fred buys 16 bags of tortilla chips and 28 jars of salsa dip. What is the ratio of salsa jars to bags of tortilla chips? Simplify your answer.
I GIVE BRAINLIEST AND EXTRA POINTS
Round to nearest 10th find value of X
Answer:
x=134
Step-by-step explanation:
Subtract the sum of the two angles from 180 degrees. The sum of all the angles of a triangle always equals 180 degrees. Write down the difference you found when subtracting the sum of the two angles from 180 degrees. This is the value of X.
29+17=46
180-46=134
You will know the answer is right if everything adds up to 180.
134+17+29=180
i borrowed R3 000 from the bank . the contract stipulates that i have to repay the bank R3 900 after 2 years . how much much interest must i pay the bank per year
Answer:$450 per year
Step-by-step explanation: If you borrow 3000 dollars and after 2 years you have to pay 3,900 then after 2 years the intrest is 900 dollars, divide that by 2 for the two years and you get a yearly 450 dollars.
In an arithmetic sequence (Sn=n^2 -2n) .USE formula (Tn=Sn-Sn-1) to determine Tn
Answer:
Tn=-1
Step-by-step explanation:
Please mark as brainliest
