Answer:
Comparing means from dependent samples.
Step-by-step explanation:
In the scenario described above, the 25 sampled individuals were used to test the effect of weightlifting on alleviating back pain. The samples used were not changed nor altered during the study as the same subjects who were tested to measure their level of pain before lifting weight were the same group subjected to the actual weight lifting test and again had their level of pain tested. Since only one group was involved in the study ( a single group was tested on neutral and actual treatment). Hence, the study used dependent samples to compare the average level of pain.
An engineer needs to determine the distance across a river without swimming to the other side. The engineer notices a tree on the other side of the river and suddenly has an idea.
Describe how she will sketch her idea to be able to determine the distance. Make a sketch and support you figure by number use meter as unit.
Answer:
Step-by-step explanation:
The engineer can use a clinometer to measure the angle of elevation of the top of the tree. Let the height of the tree be represented by x, the she could determine the distance across the river, d, by applying the trigonometric function.
Tan θ = [tex]\frac{opposite}{adjacent}[/tex]
= [tex]\frac{x}{d}[/tex]
the the distance, d = x ÷ Tan θ
Assume the angle of elevation of the top of the tree is [tex]30^{o}[/tex], and the height of the tree is 10 m, then the distance, d, across the river would be;
d = [tex]\frac{10}{0.5774}[/tex]
= 17.3190
d = 17.32 m
The sketch to the explanation is attached to this answer for more clarification.
An Olympic
swimming pool
holds 660,000
gallons of water.
325,000 gallons
per second fall
from Victoria
.Falls
How many
seconds will it
take to fill up
an Olympic
pool with
Victoria Falls
How many seconds will it take to fill up an Olympic pool with Victoria Falls?
The volume of water pouring from Victoria Falls is enough to fill an Olympic swimming pool in around 2.03 seconds.
What is volume?Volume, measured in cubic units, is the 3-dimensional space occupied by matter or encircled by a surface. The cubic meter (m³), a derived unit, is the SI unit of volume. Volume is another word for capacity.
To find out how many seconds it will take to fill up an Olympic swimming pool with the amount of water falling from Victoria Falls, we need to divide the total amount of water in the pool by the amount of water falling per second:
660,000 gallons ÷ 325,000 gallons/second ≈ 2.03 seconds
Therefore, it would take approximately 2.03 seconds to fill up an Olympic swimming pool with the amount of water falling from Victoria Falls.
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can someone please help me
Answer:
It would be 1 since x is directly = to y
Step-by-step explanation:
Mr. Vara is designing post caps in the shape of a square pyramid for a fence that he just built in his backyard. The caps are solid wood and each one has a volume of 94.5 cubic centimeters.What is the height, in centimeters, of a wooden post cap?
Answer:
Height of the square pyramid is 6.569 centimeter
Step-by-step explanation:
The volume of the square pyramid is 94.5 cubic centimeters
The height of the square pyramid will be equal to the lengths of the sides of the square.
The volume of the square pyramid is given by
[tex]a^2 * \frac{h}{3}[/tex]
or
[tex]\frac{a^3}{3} = 94.5\\a^3 = 94.5 *3\\a = \sqrt[3]{94.5*3} \\a = 6.569[/tex]centimeter
Height of the square pyramid is 6.569 centimeter
how can i solve this?
Answer:
16π (units squared)
Step-by-step explanation:
Picture a full circle with radius 8. The area of this full circle is A = πr².
Now substitute 8 for r: We get A = π(64) = 64π.
Now multiply this result by 1/4 to obtain the area of the figure shown:
A = (1/4)64π = 16π (units squared)
A cylindrical can of cocoa has the dimensions shown at the right. What is the approximate area
available for the label?
Diameter - 7 height - 4
Answer:
164.93 I believe is the answer
Help I need this now.
Answer:
I think Rose isn't correct.
Answer:
Rosa is incorrect because if we substitute b, for the number 4. The answer is not equal to 10.
Step-by-step explanation:
(3+9b)-2b=10
(3+9*4)-2*4=10
(3+36)-8=10
39-8=10
31=10
It is incorrect because the numbers are not the same.
I need help with this, please
Answer:
B
Step-by-step explanation:
The opposite angles in a cyclic quadrilateral are supplementary, sum to 180°
∠ I + ∠ K = 180° , that is
91° + ∠ K = 180° ( subtract 91° from both sides )
∠ K = 89° → B
NO LINKS OR I WILL REPORT but helppp plsss A triangle has two sides of length 3 and 3. What value could the length of the
third side be? Check all that apply.
========================================================
Explanation:
We have a triangle with sides a,b,c where a = 3 and b = 3 are given. The side c is unknown, but using the variation of the triangle inequality theorem allows us to say the following:
b-a < c < b+a
3-3 < c < 3+3
0 < c < 6
The missing side c is between 0 and 6 units long, but cannot be equal to 0 and can't be equal to 6 either. Therefore, the answers must be A) 4, C) 5, and D) 2. All of these values satisfy the inequality 0 < c < 6.
Something like c = 12 is too large. I recommend cutting out two slips of paper that are 3 inches long, and you'll find it impossible to form a triangle that has a third side of 12 inches. The longest side you can form is 3+3 = 6 inches, but you wouldn't have a triangle at that point (it would be a straight line instead). This is a visual way to rule out choice E, and it also rules out choices B and F for similar reasoning.
Answer the question above
Answer:
BA
Step-by-step explanation:
The hypotenuse is the longest side or opposite the right angle.
Answer:
AB
Step-by-step explanation:
The pythagorean theorem is AC² + CB² = AB²
AB represents the hypotenuse
6x^2+3x+24=0 solve by factoring
Answer:
No real solutions
Step-by-step explanation:
Let's solve your equation step-by-step.
6x2+3x+24=0
For this equation: a=6, b=3, c=24
6x2+3x+24=0
Step 1: Use quadratic formula with a=6, b=3, c=24.
x= (−b±√b2−4ac) /2a
x=( −(3)±√(3)2−4(6)(24))/ 2(6)
x= (−3±√−567) /12
Hey! Can someone help me?
Answer:
Option 3
Step-by-step explanation:
The sentence provides the reasoning for a possible explanation.
Now, let's look at all the possible answers:
1. This doesn't show us that scientists cannot agree. A sentence like that could be that many scientists have analyzed the region, but they did not find anything.
2. This does not tell us that this region is interesting. A sentence like that would be saying that the cause of the lightning is unknown.
3. This is correct- it provides evidence for a main theory.
4. This does not explain why people name the lightning a certain way. A sentence like that could be a local fable.
Which set of angle measures could form a triangle?
A. 2º, 27°, and 33°
B. 22°, 90°, and 145º
C. 36°, 42°, 102°
D. 55°, 122°, 159°
Triangle DEF has side lengths e=9 and f=13. If the measure of angle D is 41°, what is the length of side d?
• 13.5
• 5.1
• 6.9
• 8.6
Answer:
8.6
Step-by-step explanation:
Use the law of cosines
[tex]d^{2} = e^{2} + f^{2} -2ef cos D[/tex]
[tex]d^{2} = 9^{2} + 13^{2} - 2(9)(13) cos 41\\ = 81 + 169 - 176.602\\ = 73.3979\\d = \sqrt{73.3979} = 8.6[/tex]
What is the area of triangle ABC?
Select the correct choice.
A: 6sqrt3
B: 18sqrt3
C: 36sqrt3
D: 72sqrt3
Answer:
C
Step-by-step explanation:
The area (A) of the triangle is calculated as
A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the perpendicular height )
The triangle is equilateral , since 3 angles = 60°
Then base AB = 12
Find height CD using the sine ratio in the right triangle ( there are 2 )
sin60° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{CD}{BC}[/tex] = [tex]\frac{CD}{12}[/tex] = [tex]\frac{\sqrt{3} }{2}[/tex] ← exact value of sin60° ( cross- multiply )
2CD = 12[tex]\sqrt{3}[/tex] ( divide both sides by 2 )
CD = 6[tex]\sqrt{3}[/tex]
Then
A = [tex]\frac{1}{2}[/tex] × 12 × 6[tex]\sqrt{3}[/tex] = 6 × 6[tex]\sqrt{3}[/tex] = 36[tex]\sqrt{3}[/tex] units² → C
If Each x represents 10 student then how mean students wrote 13 or more letter
Answer:
There are 3 x’s so the answer would be 30
What is the Volume of the hemisphere ? I will give BRAINLIEST
Answer:
8579 mm^3
Step-by-step explanation:
The formula for the volume of a sphere is V = (4/3)(pi)(r)^3, where r is the radius.
Here the radius is (appears to be) 16 mm.
Thus, the radius of this sphere is V = (4/3)(pi)(16 mm)^3, or 28268 mm^3.
But we want the volume of the hemisphere (half sphere). Thus,
divide the above result by 2:
The volume of this hemisphere is 8579 mm^3
Answer:
8.582
Step-by-step explanation:
volume of hemisphere is 2 / 3 π r^3
2/3 πr^3
π is 22/7
r is 1.6 mm
2/3 × 22/7 × 1.6^3 = 8.582 to 3 decimal places
Solve and graph the following inequality:
x + (-15) > 12
Answer:
x>27
Step-by-step explanation:
x−15>12
Step 1: Add 15 to both sides.
x−15+15>12+15
x>27
hope it help
The Martins' swimming pool is a square
and is in the center of a square plot that
is 34 meters on a side. They have 1,092 square meters of lawn.
How long is one side of the pool ?
Answer: 8
Step-by-step explanation:
x^2 = (34•34)-1,092
x^2= 1,156-1,092
x^2= 64
x=8
In parallelogram HJKL if m<KLH=170 find m<LHJ
Answer:
bro what is even happening here
so confused but okay
Answer:
∠ LHJ = 10°
Step-by-step explanation:
Consecutive angles in a parallelogram sum to 180°
Then
∠ KLH + ∠ LHJ = 180°
170° + ∠ LHJ = 180° ( subtract 170° from both sides )
∠ LHJ = 10°
A car rental company charges a $50 flat fee and an additional $20 per day. A second company also
charges a flat fee plus an additional cost per day. This tables the cost to rent a car from the second
car company
What is the absolute value of the difference, in dollars, between the flat fees the two companies
charge?
Enter your response here:
Days
2
4
Cost
$130
$160
$175
Only 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, . ,and / are allowed in your answer.
Answers that are mixed numbers must be entered as an improper fraction or a decimal.
5
The difference between the flat fees of the two companies is $20
Factor out the GCF from the given polynomial. 10^3 + 16^2 - 18x 10^3 + 16^2 - 18x = (Type your answer in factored form.)
Correct question is;
Factor out the GCF from the given polynomial. 10x³ + 16x² - 18x. (Type your answer in factored form.)
Answer:
GCF = 5x² + 8x - 9
Step-by-step explanation:
The given polynomial is;
10x³ + 16x² - 18x
First thing is to inspect the coefficients and see the greatest number that all three can be divided by evenly without remainder.
The greatest number is 2.
Secondly let's inspect the variables to see what we can factor out.
They all contain x. Thus, x is a factor.
Thus, we will divide each term by 2x to obtain the GCF of the polynomial.
GCF = (10x³/2x) + (16x²/2x) - (18x/2x)
GCF = 5x² + 8x - 9
convert 5 cubic miles to cubic feet
Answer:
7.36e+11
Step-by-step explanation:
Plzzz help!!! ill givee brainliest!!!!
A student attempted to generate an equivalent expression using the distributive property, as shown below: 2(x + 5) = 2x + 5 What was the mistake made? (5 points) a 2 was not multiplied by x b 2 was not multiplied by 5 c Incorrect sign was used for the first term d Incorrect sign was used for the second term
Answer:
b) 2 was not multiplied by 5
Step-by-step explanation:
Correct answer: 2x + 10
How many solutions can be found for the equation 12x + 8 = 10x + 18? (4 points)
a
No Solution
b
One
c
Two
d
Infinitely Many
Answer:
b
Step-by-step explanation:
Given
12x+ 8 = 10x + 18 ( subtract 10x from both sides )
2x + 8 = 18 ( subtract 8 from both sides )
2x = 10 ( divide both sides by 2 )
x = 5
The equation has one solution
Answer:
B
Step-by-step explanation:
verification
12 x 5 + 8 = 10 x 5 + 18
68= 68
since the answer is 68
it is the only one answer that you can get
Pls HELP I don’t understand :,(
What is the value of variable for -4(y - 2) = 12
Explain please
Answer:
-4(y - 2) = 12
Standard form:
−4y − 4 = 0
Factorization:
−4(y + 1) = 0
Solutions:
y = −4
4
= −1
Step-by-step explanation:
Are the two triangles congruent ? Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
Answer:
yes
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
None of the given sides or angles are congruent, so they are not congruent.
7/8 -7/10 ,giving your answer as a fraction in its lowest terms
Answer:
7/40
Step-by-step explanation:
(70_56)/80
= 14/80
divided by 2
=7/40
A phone company surveys a sample of current customers to determine if they use their phones most often to text or use the Internet. They sort the data by payment plans, as shown below. Plan A: 27 text, 21 Internet Plan B: 13 text, 10 Internet Answer the questions to determine a conditional probability. How many customers are on payment plan B? customers How many of the customers on plan B text? customers What is the probability that a randomly selected customer who is on plan B uses the phone most often to text? Give the answer in fraction form.
Answer:
a=23 b=12 c=12/23
Step-by-step explanation:
I just did it on EDG, got it wrong so i could give you the answer XD
The likelihood that a randomly chosen consumer on plan B would text on the phone the most frequently is 13/23.
What is probability?Probability is a number that expresses the likelihood or chance that a specific event will take place. Both proportions ranging from 0 to 1 and percentages ranging from 0% to 100% can be used to describe probabilities.
According to the given data,
Number of customers on plan B = 13 + 10 = 23
Number of customers on plan B who text = 13
P(text|plan B) = P(text and plan B) / P(plan B),
where P(text and plan B) is the probability of a customer being on plan B and texting, and P(plan B) is the probability of a customer being on plan B, can be used to calculate the likelihood that a randomly chosen customer on plan B will text the most.
So,
P(text|plan B) = 13/23
Therefore, the probability that a randomly selected customer who is on plan B uses the phone most often to text is 13/23.
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