The width of the interval based on 100 men would be about three times the width of the interval based on 900 men.
What is the width of the interval?
The width of a confidence interval for a proportion is proportional to the standard error of the sample proportion, which is proportional to the square root of the sample size.
The standard error is defined as the standard deviation of the sampling distribution of the sample proportion, which is estimated by the standard deviation of the Bernoulli distribution (square root of the sample proportion times (1 - sample proportion) divided by the sample size).
So, if the sample size is reduced by a factor of 9 (from 900 to 100), the standard error (and hence the width of the confidence interval) would increase by a factor of 3 (square root of 9).
Therefore, The width of the interval based on 100 men would be about three times the width of the interval based on 900 men.
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Written as a product of its prime factors, 540 = 2² x 3³ x 5.
Find the smallest positive integer k such that 540k is a perfect cube.
The smallest positive integer k such that 540k is a perfect cube is 8.
What is perfect cube? How to find smallest positive integer in perfect cube?A perfect cube is an integer (whole number) that is the result of cubing another integer. Cubing an integer is the same as multiplying it by itself three times. For example, 8 is a perfect cube because it is the result of cubing 2 (2 x 2 x 2 = 8). The smallest positive integer in a perfect cube is 1, because it can be achieved by cubing the integer 1 (1 x 1 x 1 = 1). To find the smallest positive integer in a perfect cube, you must first determine what the cube is. To do this, you can use the formula c^3 = a, where c is the cube root of a. This formula can be solved to find c, which is the cube root of a, or the number that was cubed to get a. Once c is determined, the smallest positive integer in the cube is c^3, or c cubed. For example, let's say you want to find the smallest positive integer in the cube of 27. You would first use the formula c^3 = 27 to find c, which is 3. Then, you would use the formula c^3 = a to calculate the smallest positive integer in the cube, whichTo learn more about perfect cube refer to:
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Given (x – 7)2 = 36, select the values of x. x = 13 x = 1 x = –29 x = 42
=====================================
Work Shown:
[tex](\text{x}-7)^2 = 36\\\\\sqrt{(\text{x}-7)^2} = \sqrt{36}\\\\\text{x}-7 = \pm\sqrt{36}\\\\\text{x}-7 = \pm6\\\\\text{x}-7 = 6 \ \text{ or } \ \text{x}-7 = -6\\\\\text{x} = 6+7 \ \text{ or } \ \text{x} = -6+7\\\\\text{x} = 13 \ \text{ or } \ \text{x} = 1\\\\[/tex]
-------------
Check:
Plug in x = 13
[tex](\text{x}-7)^2 = 36\\\\(13-7)^2 = 36\\\\(6)^2 = 36\\\\36 = 36 \ \ \checkmark\\\\[/tex]
This confirms x = 13
Now check x = 1
[tex](\text{x}-7)^2 = 36\\\\(1-7)^2 = 36\\\\(-6)^2 = 36\\\\36 = 36 \ \ \checkmark\\\\[/tex]
The value x = 1 is confirmed as well.
Both solutions are confirmed.
For each equation, write a story problem that could be represented by the equation. Then find the value of x and explain what it represents in your story. 3/4 + x = 2
The story: John requires 2 liters of oil for a trip. they have 3/4 liters of oil at home, how many liters of oil will he get from his father to make the trip?
x in the equation is the liters of oil required from the father. It was solved to be 1 1/4
How to solve for xIn the problem, the equation made available is 3/4 + x = 2
The solution of the equation is as follows
3/4 + x = 2
collecting like terms
x = 2 - 3/4
x = 5/4
x = 1 1/4
The value of x = 1 1/4
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Calculate the amount of the child and dependent care credit allowed before any tax liability limitations or other credits for 2019 in each of the following cases, assuming the taxpayers had no income other than the stated amounts. William and Carla file a joint tax return. Carla earned $27,500 during the year, while William attended law school full-time for 9 months and earned no income. They paid $3,500 for the care of their 3-year-old child, Carl
Carla earned $27,500 during the year, while William attended law school full-time for 9 months and earned no income. They would not get dependent child care credit.
Credit for dependent care:
A married couple or single person who cares for his or her own or dependent child can earn this dependent care credit.
'The dependent tax credit is non-refundable.
* General credit qualifications.
- Employment-related care cost is required for a
= dependent under the age of 13 or
A dependent or spouse who lives with the taxpayer for more than half the year and is physically or mentally incapacited.
* amount of credit.
* applicable percentage - eligible care cost
- the appropriate percentage ranging from 20% to 35% depending on AGI
If your income is less than $15,000, the rate will be 35%. Income above $15,000 will decrease by 1% for every 2000.
* To get credit, married taxpayers must file a joint return.
*the cost of eligible care has been defined.
- costs for qualified individual care within the taxpayer's homr or outsider's home.
= if outside the home, the dependent or spouse must spend at least 8 hours per day within the taxpayer's home.
= unless the relative is a child under the age of 19, child care payments to a relative are eligible for the credit.
- The amount of costs that qualify is the lower of the actual cost or 3000 for one qualified individual and 6000 for two or more qualified individuals.
* Limitation on earned income.
- The amount of eligible care costs may not exceed the lower of the taxpayer's or spouse's earned income.
- Full-time students, disabled taxpayers, and spouses are deemed to have earned income up to the monthly limits of $250 for one child and $500 for two.
William and carla submit a combined tax return.
Carla earned $27,500 last year.
William attended law school full time for 9 months without earning any money.
They paid $3,500 for carl, their 3 year old child.
William and Carla are ineligible for dependent care credit. Because they should both have employment income.
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I’ll give brainliest
Which function is NOT linear
f(x) = -1/x is not a linear function.
Option (B) is correct,
What is a function?
A function is a mathematical relationship between two sets of quantities, called the domain and the range. In other words, a function is a rule that assigns to each element of a set (called the domain) exactly one element of another set (called the range). The most common way to represent a function is using an equation of form f(x) = y, where x is the input variable (or independent variable) and y is the output variable (or dependent variable).
A linear function is a function whose graph is a straight line. A linear function can be represented by an equation of the form f(x) = mx + b, where m and b are constants.
Out of the given options, the function which is not linear is B) f(x) = -1/x
This function is not linear because it's graph is not a straight line.
All the other options are linear functions, option A) f(x) = x/4 is a function with a slope of 1/4, option C) f(x) = 2x + 1 is a function with a slope of 2, and option D) f(x) = -3 is a constant function with a slope of 0.
Hence, f(x) = -1/x is not a linear function.
Option (B) is correct.
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The factors of 42 are shown below. Which of them are not prime?
1
2 3 6
7 14 21 42
Answer:2 and 3
Step-by-step explanation:
fill in the table using this function rule.
y=-10x-1
The table using this function rule is:
x y
-1 -9
0 1
1 11
5 51
How might a function rule be demonstrated?When the specified input values are applied, the function rule y = 2x+4 produces the output values displayed in the table. As of right now, the output numbers are denoted by and the input values are denoted by and. The function rule y = 3 x + 1 can therefore alternatively be represented as f (x) = 3 x + 1.
The connection between the input or domain and the output or range is called a function rule. When there is exactly one value in the range for each domain value, a relation is a function.
y = 10x+1
x = -1→y=10(-1)+1=-10+1→y=-9
x = 0→y=10(0)+1=0+1→y=1
x = 1→y=10(1)+1=10+1→y=11
x = 5→y=10(5)+1=50+1→y=51
x y
-1 -9
0 1
1 11
5 51
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The complete question is,
Use this function rule to complete the table's fields.
y = 10x + 1.
ii. (2 points) you put the coin back, take another, and flip it 4 times. it lands t, h, h, h. how likely is the coin to be type h50?
If the coin is tossed four times , then the probability of getting exactly two heads and two tails is 3/8 .
the number of outcomes in tossing a coin is = 2 = {H , T} ;
the number of outcomes in tossing the coin four times is = 2⁴ = 16 ;
we have to find the probability of getting exactly 2 heads and 2 tails :
So , the required outcomes will be = {HHTT, HTHT, HTTH, THHT, THTH , TTHH} ;
the number of favorable outcomes is = 6 ;
the probability is = 6/16 = 3/8 .
Therefore , the required probability is 3/8 .
The given question is incomplete , the complete question is
If a coin is tossed 4 times, what is the probability of getting exactly two heads and two tails ?
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The sides of a triangle are measured at a = 4, b = 5 and c = 6. What is the length of Median A?
The length of median A is 11.7.
What is centroid and median of a triangle and its coordinates?The point of intersection of a triangle's medians is its centroid (the lines joining each vertex with the midpoint of the opposite side).
If the triangle has its vertices as (x_1, y_1), (x_2, y_2) , \: (x_3, y_3), then the coordinates of the centroid of that triangle is given by:
[tex](x,y) = \left( \dfrac{x_1 + x_2 + x_3}{3} + \dfrac{y_1 + y_2 + y_3}{3} \right)[/tex]
Given;
The sides of triangle
a = 4, b = 5 and c = 6
The median of triangle =½√(2b2+2c2-a2).
=(2*5*5+2*6*6-4*4)
=(50+72-16)
=[tex]\sqrt{138}[/tex]
=11.7
Therefore, the median of triangle will be 11.7
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Molly's teacher got six boxes of pencils each box contains P pencils he use 16 pencils in the first month of school write an expression that represents the given situation
Answer:
The expression that represents the given situation is 6P - 16.
Step-by-step explanation:
The teacher got six boxes of pencils, and each box contains P pencils. Since the teacher used 16 pencils in the first month of school, the total number of pencils left after the first month can be represented by the expression 6P - 16.
This expression means that the teacher started with 6 boxes of pencils, each containing P pencils, for a total of 6P pencils. But since the teacher used 16 pencils in the first month, the total number of pencils left after the first month is 6P - 16.
A line is perpendicular to y = −1/3x + 7
and intersects the point (4,2).
What is the equation of this
perpendicular line?
y = [?]x + [ ]
Hint: Use the Point-Slope Form: y - y₁ = m(x - X1)
Then write the equation in slope-intercept form.
A line that is perpendicular to the line y = -1/3x + 7 has a slope that is the negative reciprocal of -1/3 which is 3.
We know that the line intersects the point (4,2), so we can use this point and the slope to write the equation of the line in point-slope form:
y - y1 = m(x - x1)
where (x1, y1) is the point the line passes through, m is the slope, and y and x are the coordinates of any point on the line.
So the equation of the line that is perpendicular to y = −1/3x + 7 and intersects the point (4,2) is:
y - 2 = 3(x - 4)
Simplifying this, we get
y = 3x - 2
To convert this to the slope-intercept form we can rewrite it as
y = 3x + b
Therefore, the equation of the line that is perpendicular to y = −1/3x + 7 and intersects the point (4,2) is y = 3x - 2
Diane deposits $400 into an account that pays simple interest at a rate of 5% per year. How much interest will she be paid in the first 2 years
(7th grade math)
Answer:
Simple interest is calculated by multiplying the principal (the initial amount of money deposited), the interest rate, and the number of years the money is on deposit.
To find out how much interest Diane will be paid in the first 2 years, we need to calculate the total interest earned over that time period.
First, we find the interest rate by multiplying the annual interest rate of 5% by .01 (to convert the percentage to decimal form)
0.05 * .01 = 0.05
Next, we find the total interest earned by multiplying the principal (400), the interest rate (0.05), and the number of years (2)
400 x 0.05 x 2 = 40
So, in the first 2 years, Diane will be paid $40 in interest on her deposit of $400.
Answer:
in total, Diane will be paid $20 + $40 = $60 in interest over the first 2 years.
Step-by-step explanation:
Simple interest is calculated as:
I = Prt
where:
I = Interest
P = Principal (initial amount deposited)
r = Interest rate (expressed as a decimal)
t = Time (in years)
So in this case, with a principal of $400 and an interest rate of 5% (or 0.05 as a decimal), the interest paid in the first year would be:
I = $400 * 0.05 * 1 = $20
And in the second year, it would be:
I = $400 * 0.05 * 2 = $40
So in total, Diane will be paid $20 + $40 = $60 in interest over the first 2 years.
state if the two triangles are congruent and how
Correct option is B, the given triangles are congruent by LL.
Theorem LLAccording to the leg-leg theorem (LL theorem), if the legs of two right triangles are the same length, then the complete triangle must be congruent.
Keep in mind that in this instance, the shorter (non-hypotenuse) sides of the triangle are referred to as the "legs." Right triangle sides all adhere to a particular pattern known as the Pythagorean theorem, which is why this theorem holds true.
According to the Pythagorean theorem, the length of the hypotenuse, squared, equals the length of each of the two legs, squared. Congruence states that two triangles must have equal hypotenuses and equal legs in order to be congruent.
Thus, the side-side-side (SSS) theorem, which was previously mentioned, is simply condensed into the leg-leg theorem.
In the given triangles,
the base of the triangles is same
the height of the triangles is common,
So, by Leg - Leg theorem, triangles are congruent.
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What is the scale factor from Figure A to Figure B?
The scale factor of figure A to fig B is 1 : 4
What is scale factor?A scale factor is defined as the ratio between the scale of a given original object and a new object, which is its representation but of a different size (bigger or smaller).
Figure A is the small triangle and figure B is the small triangle.
The ratio of the corresponding lengths of the triangles must give thesame value.
scale factor = original length/ new length
scale factor = 14/56 = 1/4 = 1 : 4
also , 16/64 = 1/4 = 1:4
7/28 = 1/4 = 1:4
therefore since the ratio of all the sides are equal, the scale factor of figure A to fig B is 1:4
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what is (8/9)^2 pls help i need it right now
Answer:
0.7901
Step-by-step explanation:
Which is the completely factored form of 12x³-60x² + 4x - 20? 4(3x² - 1)(x - 5) 4x(3x² + 1)(x - 5) 4x(3x² - 1)(x + 5) 4(3x² + 1)(x - 5)
The completely factored form of 12x³-60x² + 4x - 20 can be expreesed as 4(3x² - 1)(x - 5).
How can the completely factored form be gotten?The concept that will be used here is factorization. The process of breaking or decomposing an entity (like a number, a matrix, or a polynomial) into a product of another entity, or factors, whose multiplication results in the original number or matrix is known as factorization or factoring.
To solve this problem then we need to take out all the common ratios :
12x³ - 60x² + 4x - 20
The we can factor 4 out as;
=[ 4(3x³ - 15x² + x - 5)]
The we can factorize the inner brackets as:
[3x³ - 15x² + x - 5]
The we will have this
= [3x²(x - 5) + (x - 5)]
Then we can now express as
= (3x² + 1)(x - 5)
Therefore, option A is correct.
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Find the sum of -3x+9 and 7x2-2x+1
The sum of the given expressions -3x + 9 and 7x^2 - 2x + 1 is
= 7x^2 - 5x +10
What is Algebraic expression ?
Algebraic expression can be defined as the combination of variables and constants.
Given expressions are ,
-3x + 9 and 7x^2 - 2x + 1
So,
The sum of the expressions could be
= -3x+9 + 7x^2 - 2x + 1
= 7x^2 -3x-2x + 9+1
=7x^2 - 5x +9+ 1
= 7x^2 - 5x +10
Hence, The sum of the given expressions -3x + 9 and 7x^2 - 2x + 1 is
= 7x^2 - 5x +10
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What is the volume of this pyramid?
Answer: 5040
Step-by-step explanation: The equation for the volume of a pyramid is v=lhw/3
Answer:
Answer: 5040
Step-by-step explanation:
The volume of a triangular pyramid can be found using the formula V = 1/3AH where A = area of the triangle base, and H = height of the pyramid or the distance from the pyramid's base to the apex.
A parabola has vertex (2,3) and contains the point (0,0). Write and equation for this parabola
The equation of the parabola with a vertex (2,3) and contains the point (0,0) is: y = -3/4(x - 2)² + 3
How to write the equation of parabolaParabolic equitation or Quadratic equation with a vertex (2,3) and contains the point (0,0) is written using the vertex form of the equation which is:
(x - h)² = 4P (y - k)
OR
standard vertex form, y = a(x - h)² + k where a = 1/4p
The vertex
v (h, k) = (2, 3)
h = 2
k = 3
substitution of the values into the equation gives
y = a(x - 2)² + 3
considering the parabola passed the point (0, 0)
y = a(x - 2)² + 3
0 = a(0 - 2)² + 3
-3 = a(4)
a = -3/4
substituting for a
y = -3/4(x - 2)² + 3
hence the required equation is y = -3/4(x - 2)² + 3
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PLEASE HELP!! 100 POINTS!
A line has a slope of –2/5 and a y-intercept of –2/5. Write its equation in slope-intercept form.
Write your answer using integers, proper fractions, and improper fractions in simplest form.
Step-by-step explanation:
The slope-intercept form of a linear equation is y = mx + b, where m is the slope of the line and b is the y-intercept.
Given that the slope of the line is -2/5 and the y-intercept is -2/5. We can substitute these values into the equation:
y = -2/5x + -2/5
y = -2/5x - 2/5
The equation in slope-intercept form is y = -2/5x - 2/5.
Amy deposits $100 into an account that earns simple Interest at an annual rate of 6.5%. How much interest will she earn after 4 years
Amy will earn $26 in interest after 4 years.
How to Calculate Simple Interest?Simple interest is a type of interest calculation where interest is only earned on the original principal (initial deposit) amount. It does not take into account any interest that has already been earned and is not compounded.
To calculate the simple interest earned on a deposit, you can use the formula: I = P * r * t, where I is the interest earned, P is the principal (initial deposit), r is the annual interest rate as a decimal, and t is the time in years.
In this case:
I = (100)(0.065)(4)
I = 26
The interest is: $26.
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For the following right triangle, find the side length x. Round your answer yo the nearest hundredth
Answer:
14.87
Step-by-step explanation:
Pythagorean Thereom
c²= a²+b²
10²+11²=c²
100+121=c²
221=c²
c=14.866...
c=14.87
Enter the range of values for x:
2x - 4
10
45°
60°
[?]
Enter
The range of the values of x is 7<x<2.
In the given quadrilateral we can see that 2 of its sides are equal and the diagonal of the quadrilateral divides the quadrilateral into 2 triangles.
we can label the diagonal as "b" and the equal sides as "a".
when we apply the cosine law on the upper triangle, we get,
(2x-4)² = a² + b² - 2abcos45°
=(2x-4)² = a² + b² - 2ab×1/√2
=(2x-4)² = a² + b² - √2ab
Similarly, applying the cosine law on the lower triangle,
10² = a² + b² - 2abcos60°
= 10² = a² + b² - 2ab×1/2
= 10² = a² + b² - ab
we can clearly see from the above 2 equations formed by applying cosine law to the triangles that,
(2x-4)²<10²
2x-4<10
2x<14
x<7
and we know that 2x-4 has to be positive So,
2x-4>0
2x>4
x>2
combining these inequalities we get,
7<x<2
which gives the range, where x will belong
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Answer:
Step-by-step explanation:
The answer that thay already gave is backwards its actully 2<x<7 in acellus
cam signed up to run a 15-kilometer running race. what distance in miles will she have ran when she finishes?
Cam can run 9.3205 miles when she finishes.
mile, any of several distance measurements, such as the statute mile of 5,280 feet (1.609 km). It was derived from the Roman mille passus, or "thousand paces," which was equivalent to 5,000 Roman feet.
The term "mile" is derived from the Latin "mille passus," which means "one thousand paces," and a mile was 1,000 Roman strides, with a stride equaling two steps. In 1592, the English Parliament standardised the Mile measurement at eight furlongs (660 feet).
Cam signed up to run a 15-kilometre running race.
So, here, we will convert kilometers to miles-
I kilometer is =0.621371 miles
And, I mile =1.609344 kilometres.
Thus, converting kilometres to miles.
Simply multiply the Number of kilometres by 0.62137.
Therefore, 1 kilometre =0.621371 miles
1.5 kilometer=15*0.621371 miles =9.32057 miles
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Leila just put 14.11 gallons of fuel into her car. There were 1.9 gallons in the car to begin with. How much fuel is in Leila's car now?
Answer:
16.01 gallons of fuel.
Step-by-step explanation:
So we already know that there were initially 1.9 gallons. We have to add 14.11 gallons of fuel to the starting amount.
14.11 + 1.9 = 16.01 gallons
I hope this was able to help you :D
To find out how much fuel is in Leila's car now, we need to add the amount of fuel she just put in to the amount that was already in the car.
Leila put 14.11 gallons of fuel in the car and there were 1.9 gallons in the car to begin with.
So, 14.11 gallons + 1.9 gallons = 16.01 gallons
This is the correct answer because 14.11 gallons is the fuel Leila put into her car and 1.9 gallons is the fuel that was already in the car. Adding these two values together gives the total amount of fuel in the car now, which is 16.01 gallons.
a -ounce bottle of fresh water is . a -ounce bottle of spring water is . which statement about the unit prices is true?
The true statements about the unit prices :
spring water has a lower unit price of $0.11/ounce and fresh water has a lower unit price of $0.12/ounce
The correct answer: option (A) and option (C)
We use the unitary method in order to determine the unit price.
Here, 16-ounce bottle of spring water is $1.76. A 20-ounce bottle of fresh water is $2.40
Let us assume that the unit price of spring water be 'm' and the unit price of freshwater be 'n'.
By unitary method the unit price of spring water would be,
m = 1.76/16
m = 0.11
This means, 1 ounce bottle of spring water is $0.11
And the unit price of freshwater be:
n = 2.40 / 20
n = 0.12
i.e., the unit price of freshwater is $0.12
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The complete question is:
A 16-ounce bottle of spring water is $1.76. A 20-ounce bottle of fresh water is $2.40. which statement about the unit prices is true?
A)spring water has a lower unit price of $0.11/ounce
B) spring water has a lower unit price of $0.12/ounce
C)fresh water has a lower unit price of $0.12/ounce
D)fresh water has a lower unit price of $0.11/ounce
the equation 2(c^2+d^2)x^2+(c-d)x+9=0 has imaginary roots if
(a)c>d (b)c -d
The equation has an imaginary root when (b) c = d
How to determine when the equation has an imaginary rootFrom the question, we have the following parameters that can be used in our computation:
2(c^2+d^2)x^2+(c-d)x+9=0
At the point of imaginary root, we have
b^2 < 4ac
This means that
(c - d)^2 < 4 * 2(c^2+d^2) * 9
So, we have
c^2 + d^2 - 2cd < 72c^2 + 72d^2
Evaluate the like terms
71c^2 + 71d^2 + 2cd > 0
Using a graphing calculator, we have
c = d
Hence, the solution is (b) c = d
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what is the sum in the simpelest form
4 1/2 + 1 3/5
514
4
Which expression is equivalent to
O 16 45
O√√25
02
04
4
4
112
14
712
?
The expression is equivalent to 2, and option C is correct.
What is simplification?To simplify simply means to make anything easier. In mathematics, simplifying an equation, fraction, or problem means taking it and making it simpler. Calculations and problem-solving techniques simplify the issue. By eliminating all common factors from the numerator and denominator and putting the fraction in its simplest/lowest form, we can simplify fractions.
Given expression
[tex](\frac{4^{5/4} 4^{1/4} }{4^{1/2} } )^{1/2}[/tex]
using properties,
aⁿ/aˣ = aⁿ⁻ˣ
aⁿaˣ = aⁿ⁺ˣ
(aⁿ)ˣ = aⁿˣ
so expression is
[tex]({4^{5/4} 4^{1/4} }{4^{-1/2} } )^{1/2}[/tex]
adding powers
5/4 + 1/4 - 1/2 = 6/4 -1/2
5/4 + 1/4 - 1/2 = 1
substitute the values,
expression is, √4 = 2
Hence option C is correct.
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The length of the rectangle i 5 more than the ide of a quare and the width of the rectangle i 5 le than the ide of the quare . If the area of the quare i 45 what i the area of the rectangle
The area of the rectangle is 20 square unit.
Let the length and width of the rectangle are respectively l and w.
Let another side of square is a.
Given that length of the rectangle is 5 more than the side of square.
l = a + 5
The width of the rectangle is 5 less than the side of the square.
w = a – 5
Given that the area of square is 45 square unit.
So, a² = 45
Now calculate the area of rectangle:
Area of rectangle = l * w
= (a + 5)(a - 5)
= a² - 25
= 45 – 25
= 20
Therefore, the area of rectangle is 20 square unit.
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