A hypothesis _____.

A. must be tested

B. is supported by large amounts of data

C. is accepted by the scientific community

B. must be proven true for an experiment to be worthwhile

Answers

Answer 1
the answer is c. bc it doesn't need to be tested
Answer 2
A hypothesis is essentially an "educated guess". 
This just means that it doesn't have to be true and doesn't really have to be proven correctly in order to call it an experiment.
So with that info B,C, and D can be crossed out.

The answer is:
A. must be tested

If you make a hypothesis, you usually have to test it to see if you were right.

Related Questions

draw a rectangle give the length and the width to show that it has an area of 12cm make sure one side is longer than the other to show length and width

Answers

To find area, you multiply length * width. There are 4 sides on a number, so we need to have a equation like this. x * x * y * y = 12cm. If we do 4 * 4, we get 8. We could also use 2 * 2 = 4. 8 + 4 = 12. So, width = 8, and length = 4.

Hope this helps! ☺♥

The repeating decimal, 0.27..., is converted to the fraction 0.27..=3/x

what is the value for x in the fraction

Answers

Answer:

The value of x is 11.

Step-by-step explanation:

The given number is 0.27272727..., and it is converted to the fraction as

[tex]0.272727...=\frac{3}{x}[/tex]                 ..... (1)

Multiply both sides by 100.

[tex]0.272727...\times 100=\frac{3}{x}\times 100[/tex]

[tex]27.272727=\frac{300}{x}[/tex]            .... (2)

Subtract equation (1) from equation (2),

[tex]27.272727-0.272727...=\frac{300}{x}-\frac{3}{x}[/tex]

[tex]27=\frac{300-3}{x}[/tex]

Multiply both sides by x.

[tex]27x=297[/tex]

Divide both sides by 27.

[tex]x=\frac{297}{27}[/tex]

[tex]x=11[/tex]

Therefore the value of x is 11.

The value of the variable "x" in the fraction 0.27... = 3/x is x = 11.

To find the value of "x" in the fraction 0.27... = 3/x, we use algebraic techniques to solve for x,

Let us represent the repeating decimal 0.27... as a variable, say y,

y = 0.27...

To eliminate the repeating decimal, we multiply both sides of equation by a power of 10. In this case, we multiply by 100 to shift decimal point two places to right,

100y = 27.27...

Now, we subtract original equation from this new equation to eliminate the repeating part:

100y - y = (27.27...) - (0.27...),

Simplifying the equation:

99y = 27

y = 27/99

The fraction 27/99 is simplified further by dividing both the numerator and the denominator by their greatest common divisor, which is 9,

y = 3/11

Therefore, the required value of "x" is 11.

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A scuba diver at a depth of −12 ft (12 ft below sea level), dives down to a coral reef that is 3.5 times the diver's original depth. What is the diver's new depth?

Answers

Just multiply them both

Answer:

The diver's new depth is -42 ft.                                      

Step-by-step explanation:

Given : A scuba diver at a depth of -12 ft (12 ft below sea level), dives down to a coral reef that is 3.5 times the diver's original depth.

To find : What is the diver's new depth?

Solution :

A scuba diver at a depth of -12 ft.

Dives down to a coral reef that is 3.5 times the diver's original depth.

So, We have to multiply the original depth by 3.5.

i.e. [tex]d=-12\times 3.5[/tex]

[tex]d=-42[/tex]

Therefore, the diver's new depth is -42 ft.

Write a real world situation that can be modeled by the inequality
834 + 14s > 978 - 10s. Then solve the inequality.

Answers

Final answer:

The inequality 834 + 14s > 978 - 10s can represent a situation involving saving and spending money over time. To solve it, you perform a series of operations to isolate variable 's', which in this case results in s > 6, indicating more than six weeks required for savings to exceed spending.

Explanation:

A real world situation that can be modelled by this inequality 834 + 14s > 978 - 10s could be a scenario involving saving and spending money. Say you start with $834 and each week you save $14 (s represents the number of weeks). On the other hand, you have $978 and you spend $10 each week. You want to figure out how many weeks it will take for the amount you have from saving to be more than the amount left from spending.

Now, to solve the inequality: subtract 834 from both sides which gives 14s > 144 - 10s, then combine like terms to get 24s > 144. Finally, divide both sides by 24 to solve for s: s > 6. Therefore, it will take more than six weeks for the money you save to exceed what remains from your starting amount of $978 after spending $10 each week.

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The rise and span for a roof are shown. The pitch of a roof is the ratio of the rise to the half-span . If the rise is 8 feet and the span is 30 feet, what is the pitch in simplest form?

Answers

6.4 inches of rise per foot.

How to find the slope???

Answers

(1 - (-3))/(0 - 6)
(1 + 3)/(-6)
4/-6
-2/3

Slope formula: y2-y1/x2-x1

= -3-1/6-0

= -4/6

= -2/3

Best of Luck!

The amount of rhubarb in the original recipe is 31\2 cups. Using what you know of whole numbers and what you know of fractions, explain how you could triple that mixed number

Answers

31/2 x 3/1 = 93/2 = 46 1/2

To triple a mixed number, multiply the whole number part by 3 and triple the numerator of the fraction part. For 3 1/2, the result is 9 3/2.

To triple the mixed number 3 1/2:

Multiply the whole number by 3: 3 x 3 = 9.

For the fraction part, triple the numerator: 1 x 3 = 3. The denominator remains the same.

Therefore, tripling 3 1/2 gives 9 3/2.

Which set of data has the same mode and median?

3, 4, 6, 7, 8
3, 3, 4, 5, 5
6, 7, 7, 8, 9
2, 2, 3, 4, 6

Answers

Median is the middle number and you have to put each set in order like you've done, tick each number off and each side working in:
3,4,-6-,7,8 =6
3,3,-4-,5,5 =4
6,7,-7-,8,9 =7
2,2,-3-,4,6 =3
Mode is the number that shows up the most
3,4,6,7,8= no mode
3,3,4,5,5= 3 and 5
6,7,7,8,9=7
2,2,3,4,6=2

6,7,7,8,9 both have 7 for mode and median

Answer:

6,7,7,8,9 both have 7 for mode and median

Step-by-step explanation:

The perimeter of a triangle is 105. the lengths of all three sides are represented by three consecutive odd integers. Find the length of the longest side

Answers

the longest side of the triangle is 37.


What does academic integrity mean?

Answers

Final answer:

Academic integrity is essential for a fair and genuine educational experience, emphasizing honesty and accountability in all academic endeavors. It is crucial for building trust, equity, and facilitating real learning outcomes, necessitating a collective effort from the academic community to maintain these values. The widespread issue of academic dishonesty further highlights the need for strict adherence to integrity principles.

Explanation:

Academic integrity is the cornerstone of a meaningful educational experience, emphasizing the value of honesty and fairness within the academic community. It involves the commitment to avoid cheating, plagiarism, and any form of deception or fraud in academic work, ensuring that all academic activities, from research to examination, are conducted in a manner that is fair, respectful, and accountable. The importance of academic integrity lies not only in the cultivation of a fair and trustworthy academic environment but also in fostering genuine learning and understanding, thereby empowering students to achieve authentic success that extends well beyond their academic careers.

Despite the challenges posed by technological advancements and digital resources, which have made cheating more accessible and harder to detect, maintaining academic integrity is crucial. It builds trust, understanding, equity, and facilitates real, meaningful learning outcomes. Faculty, administrators, and students alike bear the responsibility of upholding these principles to ensure that the academic community remains a space where fairness prevails and genuine knowledge acquisition is celebrated.

According to the International Center for Academic Integrity, a significant number of students have admitted to engaging in dishonest behaviors, which underscores the ongoing battle against academic dishonesty. Highlighting the importance of maintaining integrity, these statistics serve as a reminder of the collective effort needed to nurture an academic culture that values honesty above all.

The formula f 5280m can be used to convert a measurement of f feet to an equivalent measurement of m miles. If an airplane flies at 21,120 feet above the ground, how much is that in miles?

Answers

Just to help you, that formula is saying that 1 mile is equivalent to 5280 feet, i.e. the number of feet is equal to 5280 * number of miles.

So, you know the number of feet = 21,120 and have to convert that into the equivalent number of miles:

f = 5280m => m = f / 5280

m = 21,120 / 5280 = 4 miles

Answer: 4 miles

A factory produces 7,482 widgets per day. It ships these widgets in 2 crates. Each widget sells for $7. How much money does one crate earn?

Answers

7,482 divided by 2 = 3,741.

Each crate is 3,741 widgets.

So, let's put that aside, now each widget is $7.

You multiply 7482 x 7 which is 52,374.

Carys is checking her tax bill for the last year. The tax rates were as follows: No tax of the first £11 000 of earnings. Earnings in excess of of £11 000 and up to £43 000 taxed at a rate of 20%. Earnings in excess of £43 000 and up to £150 000 taxed at a rate of 40%. Earnings over £150 000 taxed at a rate of 45%. Last year Carys, earned £45 600 before tax. How much tax did she pay in total. Show your working.
It isn't £18240 it says its wrong

Answers

£11000 is the tax free allowance, so we deduct 11000 from 45600=34600. This qualifies for the 40% rate. That comes to £13,840.

Answer:

total tax is = 14685 pound

Step-by-step explanation:

Given data:

For first year -  

earning is 11000 pound

for second year

income is = 43000 - 11000 = 32000 pound

tax rate = 20%

for third year

income is = 150000 - 43000 = 107000 pound

tax rate = 40%

for fourth year

income is = 158900 - 150000 = 8900 pound

tax rate = 45%

As it is given there is no tax on first year

Tax in 2nd year  = 0.20 × 32000 = 6400 pound

Tax in 3rd year  = 0.40 × 107000 = 42800 pound

Tax in 4th year  = 0.45 × 8900 = 4005 pound

Which ordered pairs are solutions to the inequality x+3y≥−8?

Select each correct answer.

Answers

x+3.y≥−8

Let x ≥ -5 And y ≥ -1 , Then:

(-5) + 3(-1) ≥ -8  . The solution is (-5 , -1)

Answer:

A. [tex](-1,-2)[/tex]

D. [tex](-6,0)[/tex]

E. [tex](-5,-1)[/tex]

Step-by-step explanation:

We have been given an inequality [tex]x+3y\geq -8[/tex]. We are asked to find the ordered pairs that are solution to the given inequality.

Let us check each ordered pair by substituting in the given inequality.

A. [tex](-1,-2)[/tex]

[tex]-1+3(-2)\geq -8[/tex]

[tex]-1-6\geq -8[/tex]

[tex]-7\geq -8[/tex]

Since the given inequality holds true, therefore, ordered pair [tex](-1,-2)[/tex] is a solution for the inequality.

B. [tex](-16,2)[/tex]

[tex]-16+3(2)\geq -8[/tex]

[tex]-16+6\geq -8[/tex]

[tex]-10\geq -8[/tex]

Since the given inequality is not true, therefore, ordered pair [tex](-16,2)[/tex] is not solution for the inequality.

C. [tex](0,-3)[/tex]

[tex]0+3(-3)\geq -8[/tex]

[tex]0-9\geq -8[/tex]

[tex]-9\geq -8[/tex]

Since the given inequality is not true, therefore, ordered pair [tex](0,-3)[/tex] is not solution for the inequality.

D. [tex](-6,0)[/tex]

[tex]-6+3(0)\geq -8[/tex]

[tex]-6+0\geq -8[/tex]

[tex]-6\geq -8[/tex]

Since the given inequality holds true, therefore, ordered pair [tex](-6,0)[/tex] is a solution for the inequality.

E. [tex](-5,-1)[/tex]

[tex]-5+3(-1)\geq -8[/tex]

[tex]-5-3\geq -8[/tex]

[tex]-8\geq -8[/tex]

Since the given inequality holds true, therefore, ordered pair [tex](-5,-1)[/tex] is a solution for the inequality.

(4x6) x 3 = 4 x (3x6)

Answers

This is the associative property (because of the parenthesis)

hope this helps

Is the product of two mixed number less than, between,or greater than the two factors?explain

Answers

The product of two mixed numbers is greater than the two factors (assuming that the two numbers are positive and greater than or equal to 1).
To better understand this, let's take as an example the multiplication of 1.5 and 2.25.
Both are mixed numbers, their multiplication is as follows:
1.5 * 2.25 = 3.375
The two factors here are 1.5 and 2.25 and the product is 3.375 which is greater than the factors

Given the following functions: f(u)=u9/2 and g(x)=x10+1. Find:
f(g(x)=

f′(u)=

f′(g(x)=)

g′(x)=

(f∘g)′(x)=

Answers

Final answer:

The function f(g(x)) is ((x^10+1)^(9/2), the derivative f'(u) is (9/2)u^(7/2), the derivative f'(g(x)) is (9/2)(x^10+1)^(7/2), the derivative g'(x) is 10x^9, and the derivative (f ∘ g)'(x) is the product of g'(x) and f'(g(x)) which equals to 10x^9 * (9/2)(x^10+1)^(7/2).

Explanation:

The functions are defined as f(u)=u9/2 whereas g(x)=x10+1.

To find f(g(x)), input g(x) into the f function. Thus, f(g(x))=((x10+1)9/2.

Next, the derivative of f(u) would be: f'(u)= (9/2)u7/2.

For f'(g(x)), replace u with g(x) in f'(u): f'(g(x))=(9/2)(x10+1)7/2.

The derivative of g(x) is: g'(x)=10x9.

Lastly, to find (f ∘ g)'(x), use the chain rule which states that (f ∘ g)'(x) = g'(x) * f'(g(x) : (f ∘ g)'(x) = 10x9 * (9/2)(x10+1)7/2.

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What is this when you subtract 4

Answers

The answer is 0.

1/2x = -1/2x
Add 1/2x to both sides.
1x=0
Divide 1 to both sides. 
x= 0
I hope this helps love! :)

The sum of two numbers is x. If one of the numbers is 12, what is the other ?

Answers

If the sum of two numbers is x

Then the equation is like this:

a+b = x

Then it says one of the number is 12. Change either a or b into 12

12 + b =x

If we want to find the other number, we need the make it into the subject

b = x - 12

Hope that help.
 Y would be the other unknown number.
 
12 + Y = X

12-12+Y=X-12

Y=X-12

Complete the patterns 9430, 94.3, 9.43

Answers

the last one could be .943
.943, .0943 and then keep moving the decimal 1 space to the left

Sides that match up between two similar figures are called corresponding sides.

Use the diagram of two similar triangles to complete the statements below.

The person's shadow in the smaller triangle corresponds to the _________ in the larger triangle.

A. Height of the Flag Pole
B. Shadow of the Flag Pole
C. Longest side

The longest side of the large triangle corresponds to the ________ side of the small triangle.
A. Shortest
B. Vertical
C. Longest

Answers

Final answer:

Corresponding sides in similar figures match up. The person's shadow in the small triangle corresponds to the shadow of the Flag Pole in the large triangle. The longest side of the large triangle corresponds to the Longest side of the small triangle.

Explanation:

Corresponding sides in similar figures are the sides that match up.

In the given diagram of two similar triangles, the person's shadow in the smaller triangle corresponds to the shadow of the Flag Pole in the larger triangle.

The longest side of the large triangle corresponds to the Longest side of the small triangle.

Give your answer as a reduced proper or improper fraction 16/25 +-3/10

Answers

The correct answer would be 17/50 because you have to make the 2 bottom numbers the same.
16/25 and -3/10 must become 34/50 and -15/50. and since 15/50 is negitive this is basically a subtraction problem. so 34/50 - 15/50 = 19/50.and 19 cant divide so the answer is 19/50.

Approximately 1 million people immigrated to the U.S. from 1850 to 1900.


True
False

Answers

From the year 1850 to the year 1900, roughly 16 million individuals immigrated to the United States from various locations. In the decade from 1850 to 1860 alone, more than 1 million immigrants arrived in the United States, thus proving the original statement to be false.

The value of a collector’s item is expected to increase exponentially each year. The item is purchased for $500. After 2 years, the item is worth $551.25. Which equation represents y, the value of the item after x years?

y = 500(0.05)x
y = 500(1.05)x
y = 500(0.1025)x
y = 500(1.1025)x

Answers

i think it is C!!!!!!!!!!

Answer: [tex]y=500(1.05)^x[/tex]

Step-by-step explanation:

We know that the general exponential equation to find the value after x years is written as :-

[tex]y=Ab^x[/tex], where A is the initial value and b is the multiplicative rate of change and x is the time period.

Given : The initial amount of a product = $500

After 2 years, the item is worth $551.25.

Substitute A = 500, x=2 and y= 551.25 in the above equation we get

[tex]551.25=500b^2\\\\\Rightarrow\ b^2=\dfrac{551.25}{500}\\\\\Rightarrow\ b^2=1.1025\\\\\Rightarrow\ b=\sqrt{1.1025}=1.05[/tex]

Now, substitute b= 1.05, A = 500 in the general exponential equation, we get the equation represents y, the value of the item after x years as :-

[tex]y=500(1.05)^x[/tex]

Tony buys a CD that is priced at $13.59. He has a coupon for $1.85 off. He pays with a $20 bill. Which is the best whole number estimate of how much change he gets? $8 $8.26 $9 $9.26

Answers

I'd suggest rounding up both $13.59 and $1.85:  $14 and $2.  Subtracting the discount (~$2) from the price (~$14) results in $12.  Subtracting this discounted price from the $20 cash in hand results in change of approx. $8.

Answer:

I think A

Step-by-step explanation:

For a p-type silicon in which the dopant concentration na = 5x10^18/cm^3

Answers

For a p-type silicon in which the dopant concentration N A = 5 × 10^ 18 /cm^3 , find the hole.

For a p-type silicon in which the dopant concentration NA= 5×1018/cm^3, find the hole and electron concentrations

What must be true of two rational expressions before they can be added?

A They must have common numerators.
B They must be of the same degree.
C They must have the same variables.
D The must have common denominators.

Answers

they must have common denominators

Answer:

D They must have common denominators.

Step-by-step explanation:

Rational expressions are fractions formed by two polynomials, one in the numerator and other in the denominator.

The numerator is the polynomial that is at the top of the fraction and denominator is the polynomial that is at the bottom of the fraction.

To add any fractions it is necessary that they have the same denominator, this applies to rational expressions, to add them it is required that they have the same polynomial in the denominator.

In January 2015 the price of gas was on average $2.05 per gallon this was $1.20 cheaper than a year before what is the percent of decrease in price

Answers

2.05 + 1.20 = 3.25 1.2/3.25 = 0.369 = 37%

The percentage decrease in a price is 37 percent.

What is percentage?

Percentage is defined as a given part or amount in every hundred. It is a fraction with 100 as the denominator and is represented by the symbol "%".

Given that, in January 2015 the price of gas was on average $2.05 per gallon this was $1.20 cheaper than a year.

Cost of gas per gallon = 2.05+1.20

= $3.25

Now, Percentage decrease = (Original Price - New Price)/Original Price ×100

= (3.25-2.05)/3.25 ×100

= 1.20/3.25 ×100

= 0.3692×100

= 0.37×100

= 37%

Therefore, the percentage decrease in a price is 37 percent.

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B) there is a line with positive slope that is tangent to both circles. find the equation of this line, and (c) determine the points at which this tangent line touches each circle

Answers

Given that there is a line with positive slope that is tangent to both circles [tex]x^2 + y^2 = 1[/tex] and [tex](x-3)^2 + y^2 = 4[/tex].

Let the point of tangency in the first circle be (a, b) and the point of tangency in the second circle be (c, d), then the slope of the tangent to the first circle is given by

[tex]2x+\left.2y \frac{dy}{dx}\right|_{(a, b)} =0 \\ \\ \Rightarrow \left.\frac{dy}{dx}\right|_{(a, b)} =- \frac{x}{y} =- \frac{a}{b} [/tex]

and the slope of the second circle is given by

[tex]2(x-3)+\left.2y \frac{dy}{dx}\right|_{(c, d)} =0 \\ \\ \Rightarrow \left.\frac{dy}{dx}\right|_{(a, b)} =- \frac{x-3}{y} =- \frac{c-3}{d}[/tex]

From the first circle equation, we have

[tex]x^2 = 1 - y^2 \\ \\ \Rightarrow a^2 = 1 - b^2[/tex]

and from the second equation, we have

[tex](x-3)^2 = 4 - y^2 \\ \\ (c-3)^2 = 4 - d^2[/tex]

Since the two slopes above are for the same line, then

[tex] \frac{a}{b}= \frac{c-3}{d} \\ \\ \Rightarrow ad=b(c-3) \\ \\ \Rightarrow a^2d^2=b^2(c-3)^2 \\ \\ \Rightarrow(1-b^2)d^2=b^2(4-d^2) \\ \\ \Rightarrow d^2-b^2d^2=4b^2-b^2d^2 \\ \\ \Rightarrow d^2=4b^2 \\ \\ \Rightarrow d=\pm2b[/tex]

Thus, we have

[tex] \frac{a}{b}= \frac{c-3}{2b} \\ \\ \Rightarrow a= \frac{c-3}{2} [/tex]

help me! need to show work!

Answers

the answer is 25 beacuse if you add 29 and 25 the sum is 54
29+25=54                                                                                                                            29+(-5)= 24
29+(-4)=25
29+(-3)=26
hope this helped :) if this is what you were trying to do...
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