At a used bookstore, Cindy bought 2 paperback books for $1.75 and some children's books for $0.75 each,
including tax. She spent a total of $5.75. How many children's books did Cindy buy?
A. 3
B. 4
C. 5
D. 7
Ο Α
B
ос
D

To determine whether there is a difference of opinion between doctors and nurses regarding a new postoperative procedure, the researcher conducted a survey and tabulated the data in a table form. The next step is to analyze the data using statistical methods and a significance level of 5%.

To begin the analysis, the researcher can use a statistical test such as the chi-square test for independence. This test will examine whether there is a significant association between the opinions of doctors and nurses regarding the procedure.

The chi-square test will compare the observed frequencies in each category (e.g., doctors who feel differently, doctors who feel the same, nurses who feel differently, nurses who feel the same) with the frequencies that would be expected if there was no association between the profession and opinion.

If the calculated chi-square value exceeds the critical value at a significance level of 5%, it suggests that there is a significant difference in opinion between the two groups.

The researcher should calculate the chi-square value, degrees of freedom, and compare it to the critical value from the chi-square distribution table.

If the calculated chi-square value exceeds the critical value, the researcher can conclude that there is a significant difference of opinion between doctors and nurses regarding the postoperative procedure.

It is important to note that statistical significance does not imply practical significance. Even if there is a significant difference, the magnitude of the difference should be considered in the context of the study.

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The volume of the cube is 729 dm³

Remember that all the dimensions on a cube are the same ones, then we have:

Length = Width = Depth.

And for any prism, the volume is the product between the 3 dimensions, then for any cube the volume is:

V = Length*Width*Depth.

In this case we know that the depth is 9dm, then also is the length and the width, and thus, the volume of this cube is:

V = 9dm*9dm*9dm = 729 dm³

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Answer:

Step-by-step explanation:

lan is 1.83m tall. Donna is 6cm shorter. What is Donna's height in metres? 1.77m. Bath. √34°. 20m. 11m. 11x14. Work out the range. 3 8 4 8 3 5 9. 9-3=6.

The total area of the composite figure which has triangle and rectangle is  24.41 square inches

The given composite figure has two triangles and one rectangle

Area of rectangle =length × width

=4.6×3.15

=14.49 square inches

Area of left side triangle, it has base of 3.3 in and height 3.15 inches

Area of triangle = 1/2×3.3×3.15

=5.1975 square inches

Area of triangle on right side

Base = 3 in

Height = 6.3-3.15=3.15 in

Area of triangle = 1/2×3×3.15

=4.725 square inches

Total area = 14.49 + 5.1975  + 4.725

=24.41 square inches

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The measures of the following arcs are :

m∡AB = 49°

m∡ABC = 253°

m∡BAC = 156°

m∡ACB = 311°

Note that the sum total of the arcs in a circle is 360°

m∡AB = 49° - Given

m∡ABC =  360°  107° =  253°

m∡BAC =  107 + 49 = 156°

m∡ACB = 360 - 49 = 311°

A curve's arc length is significant because it represents the distance between two locations on the curve. The circumference of a circle is equal to its arc length. The arc length of an ellipse equals the ellipse's perimeter.

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Approximately 7 employees took a break longer than 49 minutes.

We have,

In a box-and-whisker plot, the box represents the interquartile range (IQR), which includes the middle 50% of the data.

The line within the box represents the median.

The "whiskers" extend to the minimum and maximum values, excluding any outliers.

Given the information provided:

Median = 41

Q1 = 37

Q3 = 49

Largest = 55

Smallest = 35

Since Q3 represents the upper quartile and corresponds to the boundary for the upper 25% of the data, we can conclude that 25% of the employees took a break longer than 49 minutes.

Now,

The number of employees who took a break longer than 49 minutes can be estimated by calculating 25% of the total number of employees:

25% of 27 employees

= (25/100) x 27

= 6.75

Since we cannot have a fractional number of employees, we round up to the nearest whole number.

Therefore,

Approximately 7 employees took a break longer than 49 minutes.

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The value of the variable t of the exponential equation [tex]-5\cdot e^{10\cdot t} = - 30[/tex], t = (1 / 10) · ㏑ 6 (EXACT), t = 0.179 (APPROXIMATE).

In this problem we need to clear the variable t of an exponential equation with one variable, this can done by means of relationship of exponential and logarithmic functions, logarithm properties and algebra properties.

Now we proceed to present the complete procedure for the solution to the exponential equation:

[tex]-5\cdot e^{10\cdot t} = - 30[/tex]

[tex]e^{10\cdot t} = 6[/tex]

10 · t = ㏑ 6

t = (1 / 10) · ㏑ 6

t = 0.179

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Each number should be dragged to a box to complete the table as follows;

Kilometers     Meters

1                        1,000

2                       2,000

3                       3,000

5                       5,000

8                       8,000

In Science and Mathematics, a conversion factor is a number that is used to convert a number in one set of units to another, either by dividing or multiplying.

Generally speaking, there are one (1) kilometer in one thousand (1,000) meters. This ultimately implies that, a proportion or ratio for the conversion of kilometer to meters would be written as follows;

Conversion:

1 kilometer = 1,000 meters

2 kilometer = 2,000 meters

3 kilometer = 3,000 meters

4 kilometer = 4,000 meters

5 kilometer = 5,000 meters

6 kilometer = 6,000 meters

7 kilometer = 7,000 meters

8 kilometer = 8,000 meters

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Answer:

16 tvs

Step-by-step explanation:

Maura's earnings for the week equal her weekly salary (460) plus she earns 6.5% commission x number of flat screens sold x $414.

So: Total Earnings = 460+ 0.065*414*t where t is the number of tvs she has sold.

If total earnings = 890.56, just substitute that above and solve for t.

890.56= 460+ 0.065*414*t

430.56=0.065*414*t

430.56=26.91*t

430.56/26.91 = t

16 = t

She sold 16 tvs to earn 890.56.

The graph represents

[tex]{y \to -\infty}[/tex] as [tex]{x \to \infty}[/tex]

[tex]{y \to \infty}[/tex] as [tex]{x \to -\infty}[/tex]

From the given graph we can see that,

The curve represent cubic function

And we know that such cubic function is of the form

f(x) = y = -(ax³ + bx² + cx + d)

Since,

A function can approach two separate limits: one in which the variable approaches its limit by using values more than the limit, and one in which the variable approaches its limit by using values less than the limit.

Case 1:

Take limit of x approaching to infinity,

[tex]\lim_{n \to \infty} f(x) = y = -\infty[/tex]

Hence,

As x approaches to infinity the  

y approaches to negative  infinity.

Case 2:

Take limit of x approaching to negative of infinity,

Now since degree of function is 3 which is odd

Therefore,

[tex]\lim_{n \to -\infty} f(x) = y = \infty[/tex]

Hence,

As x approaches to negative infinity then  

y  approaches to infinity.

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The value of x is 9.

Given,

Trapezoid with two bases and median.

base 1 = 44

base 2 = 2x + 10

median = 36

Now,

In trapezoid two bases will be parallel to each other.

Median = 1/2(sum of two bases)

From the formula of median the value of x will be,

Median = 1/2( base 1 + base 2 )

Substitute the values,

36 = 1/2( 44 + 2x + 10 )

72 = 54 + 2x

x = 9

Hence both the bases of trapezoid are obtained.

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Answer:

23.8

Step-by-step explanation:

In a right-angled triangle, x ² + b ² = c ²

30.5 is c, we can choose b to be 19.1.

x ² + b ² = c ²

x ² = c ² - b ²

= 30.5² - 19.1²

= 565.44

x = √565.44

= 23.8 (to 3 significant figures)

Answer:

d² - 24d + c = (d - 12)² - 144 + c

a) The state sales tax on a $2,800 used car in Washington is given as follows: $257.6.

b) The total cost of the car, including tax, is given as follows: $3,057.6.

The sales tax and the total cost of the car are obtained applying the proportions in the context of the problem.

The sales tax rate is given as follows:

9.2%.

Hence, for a car of $2,800, the sales tax is given as follows:

0.092 x 2800 = $257.6.

The total cost is then obtained adding the base cost to the sales tax, as follows:

2800 + 257.6 = $3,057.6.

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Answer:

a=25

b=92

Step-by-step explanation:

Because the average of the five numbers is 51, the sum of the five numbers is 255.

a+b+73+65=255

138+a+b=255

a+b=117

a+67=b

Therefore,

a=25

b=92

Feel free to tell me if I made a mistake! :)

The principal amount of $2,287.26 from compound interest at a rate of 4.5% per year owed after six years on a loan of $1300

Since n is the number of times the interest is compounded each year, and 'r' is the rate of compound interest annually, sothe final amount after 't' years would be:

[tex]a = p(1 + \dfrac{r}{n})^{nt}[/tex]

Given that certain loan program offers an interest rate of 4.5%, compounded continuously.

Assuming no payments are made so;

First, convert R as a percent to R as a decimal

r = R/100

r = 4.5/100

r = 0.045 per year,

Then, solve the equation for P

P = A / (1 + r/n)^nt

P = 1300/ (1 + 0.045 /365)(365)^(15)

P = 1300/ (1 + 0.00010137)^(4745)

P = $2,287.26

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Answer:

The circle's circumference is approximately 106.81 centimeters.

Explanation:

The formula for the circumference of a circle is C = 2πr, where C is the circumference, π is pi (approximately 3.14), and r is the radius of the circle.

So, for a circle with a radius of 17 centimeters, its circumference can be found by:

C = 2πr

C = 2 x 3.14 x 17

C ≈ 106.81 cm

Therefore, the circumference of the circle is approximately 106.81 centimeters.

The height of the cylindrical container is approximately 5 inches.

A cylinder is simply a 3-dimensional shape having two parallel circular bases joined by a curved surface.

The volume of a cylinder is expressed as;

V = π × r² × h

Where r is radius of the circular base, h is height and π is constant pi ( π = 3.14 )

Given that:

Volume V = 251 cubic inches

Radius r = 4 inches

Height h = ?

Plug the given values into the above formula and solve for height.

V = π × r² × h

251 = 3.14 × 4² × h

251 = 3.14 × 16 × h

251 = 50.24 × h

h = 251/50.24

h = 5 inches.

Therefore, the measure of the height is 5 inches.

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The HCF (highest common factor) of 20 and 10 is 10.

To determine the 20 and 10's highest common factor (HCF).

We must identify the highest number that can divide both 20 and 10 without producing a remainder in order to determine the HCF.

1, 2, 4, 5, 10, and 20 are the variables that make up 20.

1, 2, 5, and 10 make up the number 10.

The biggest element that both 20 and 10 have as a shared component is 10.

The HCF of 20 and 10 is hence 10.

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Step-by-step explanation:

800 in total.

555 health club members.

430 smokers.

320 health club members (that means out of the total of 555) were smokers.

that means that

555 - 320 = 235 health club members were not smokers.

and out of the 430 smokers 320 were also health club members.

that means that

430 - 320 = 110 smokers were not health club members.

the question how many were health club members or smokers means how many people were either health club members or smokers.

so, we need to combine the sets of health club members and smokers.

the number of elements in the resulting set is not just the sum of elements of both sets, because some elements are in both sets and would be counted twice.

therefore, we have a few alternatives :

1. add both sets and then subtract the common part (people being in both sets), as this removes the double counting :

555 + 430 - 320 = 665

2. start with the common part (people that are in both sets) and add the extra people in both sets (health club members that do not smoke, and smokers that are not health club members) :

320 + 235 + 110 = 665

3. start with one of the full sets (e.g. all health club members) and add the extra people of the other set (all smokers that are not also health club members) :

555 + 110 = 665

or all smokers plus all health club members that were not smokers :

430 + 235 = 665

as you can see, as expected, the answer is always the same :

out of the 800 nurses 665 were health club members or smokers.

The amount of profit that will be reinvested is 5/12 million.

Profit is the excess of revenue over cost.

Profit = revenue - total cost

In order to determine the profit that will be reinvested, multiply the fraction that is reinvested by the value of the profit.

Amount that will be reinvested = profit x fraction that is reinvested

1 1/4 x 1/3 =

5/4 x 1/3 = 5/12 million

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Answer:

220 in²

Step-by-step explanation:

surface area = [area of the 4 vertical faces] + area of the base + area of top.

surface area = [2(4 X 10) + 2(5 X 10)] + (4 X 5) + (4 X 5)

= (80 + 100) + 20 +  20

= 220 in²

The odds against a direct hit is 3 to 1.

Given that the probability of a hurricane hitting at a coast is 1/4 = 0.25.

Therefore, the probability of not hitting = 1-0.25

= 0.75

we know that,

Odds against direct hit = [P(no direct hit)]/P[(direct hit)] = 0.75/0.25 = 3/1

= 3:1

Hence the odds against a direct hit is 3 to 1.

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To completely solve the problem, Karim should convert the product back into standard decimal notation.

We cannot directly apply the product of powers property because the binomial is not raised to a power itself.

(1) To convert a number from scientific notation to standard decimal notation, we multiply the coefficient (0.0258) by 10 raised to the power of the exponent (-8).

0.0258 × [tex]10^{-8[/tex]  = 0.0258 × 0.00000001

                         = 0.000000000000258

(2) The product of powers property states that when you raise a term with an exponent to another exponent, you can simplify it by multiplying the exponents.

In the expression [tex](3z + y)^3[/tex], we have a binomial term (3z + y) raised to the power of 3. This is not a situation where we can directly apply the product of powers property because the binomial is not raised to a power itself.

To simplify the expression, we need to expand it using the binomial theorem or by applying the concept of binomial expansion.

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The surface area of the composite solid is 255 square inches.

We will compute the surface area of each component and then add them together to find the surface area of the composite solid.

First, the surface area of the square prism:

Given: The square prism has a width, length, and height of 5 inches each.

Formula for the surface area of a rectangular prism: 2lw + 2lh + 2wh

Surface area of the prism = 2(5 * 5) + 2(5 * 5) + 2(5 * 5)

= 2(25) + 2(25) + 2(25)

= 50 + 50 + 50

= 150 square inches

Next, the surface area of the square pyramid at the bottom:

Given: The slant height of the pyramid on the bottom of the prism = 7.5 inches.

The base of the pyramid is a square with a side length of 5 inches.

Formula to find the lateral surface area of a square pyramid: (perimeter of base) * slant height / 2.

The base is a square, the perimeter is 4 times the side length.

Lateral surface area of the bottom pyramid = (4 * 5) * 7.5 / 2

= 20 * 7.5 / 2

= 150 / 2

= 75 square inches

Then, the Surface area of the square pyramid at the top:

Given: The height of the pyramid on top of the prism = 3 inches.

The base of the pyramid is a square with a side length of 5 inches.

Lateral surface area of the top pyramid = (4 * 5) * 3 / 2

= 20 * 3 / 2

= 60 / 2

= 30 square inches

Finally, we shall find the total surface area by summing up the surface areas of each component in this way:

Total surface area = Surface area of the prism + Surface area of the bottom pyramid + Surface area of the top pyramid

= 150 + 75 + 30

= 255 square inches

Therefore, the surface area of the composite solid = 255 square inches.

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The parabola y = x² scaled vertically by a factor of 1/10 gives y = x²/10

From the question, we have the following parameters that can be used in our computation:

The parabola y = x² is scaled vertically by a factor of 1/10

The rule of this transformation is

Image = (x, ay)

Where

a = 1/10

So, we have

y = 1/10 * x²

Evaluate

y = x²/10

Hence, the image of the function is y = x²/10

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The measure of <MNL is (71 - 3x²)/2.

We have,

Far Arc = 59 - 2x²

Near Arc = 12 - x²

Angle = 180- 2x²

Using the Formula

Angle= Average of vertical chords

180 - 2x² = (59 - 2x² + 12 - x²)/2

360 - 4x² = 71 - 3x²

289 = x²

x= 17

So, the measure of <MNL

= (71 - 3x²)/2

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Answer:

(b) 20

Step-by-step explanation:

We are trying to solve a-13 = ____ for when a=33.

Substitute 33 for a.

33-13 = 20

the answer is b) 20

Based on the assumptions, the estimated Federal Withholding Tax for Franklin Lyons would be approximately $191.68.

Determine Franklin's taxable income:

To calculate the taxable income, we need to subtract any deductions or exemptions from his gross pay. We'll consider his gross pay as the taxable income.

Taxable Income = Gross Pay = $958.38

Estimate the Federal Withholding Tax rate:

The Federal Withholding Tax rate depends on the taxable income and the individual's filing status. Let's assume a general tax rate of 20% for this estimation.

Federal Withholding Tax rate = 20%

Calculate the Federal Withholding Tax:

To find the withholding tax, multiply the taxable income by the tax rate:

Federal Withholding Tax = Taxable Income * Federal Withholding Tax rate

= $958.38 * 0.20

= $191.68

Thus, the answer is $191.68.

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The accounting equation is:

Assets (Rs. 1,75,000 - Rs. 35,000) = Liabilities (Rs. 45,000 + Rs. 5,000) + Capital (Rs. 20,000)

We have,

Based on the given transactions, we can prepare the accounting equation as follows:

a. Started business with Cash Rs. 250,000.

Assets: Cash = Rs. 250,000

b. Purchased goods amounting to Rs. 45,000 on credit from Harish.

Assets: Cash = Rs. 250,000, Inventory = Rs. 45,000

Liabilities: Accounts Payable = Rs. 45,000

c. Goods costing to Rs. 80,000 was sold for Rs. 1,25,000 on credit.

Assets: Cash = Rs. 250,000, Accounts Receivable = Rs. 1,25,000

Inventory: Rs. 45,000 - Rs. 80,000 = Rs. -35,000 (Assuming no additional purchases or returns)

Liabilities: Accounts Payable = Rs. 45,000

Capital: Retained Earnings = Rs. 1,25,000 - Rs. 80,000 = Rs. 45,000

d. Salaries outstanding Rs. 5,000.

Liabilities: Salaries Payable = Rs. 5,000

e. Rent paid Rs. 50,000.

Assets: Cash = Rs. 250,000 - Rs. 50,000 = Rs. 2,00,000

f. Withdrawn by owner for personal use Rs. 25,000.

Assets: Cash = Rs. 2,00,000 - Rs. 25,000 = Rs. 1,75,000

Capital: Retained Earnings = Rs. 45,000 - Rs. 25,000 = Rs. 20,000

Now, let's summarize the accounting equation:

Assets:

Cash = Rs. 1,75,000

Inventory = Rs. -35,000 (negative value indicates loss or returns)

Liabilities:

Accounts Payable = Rs. 45,000

Salaries Payable = Rs. 5,000

Capital:

Retained Earnings = Rs. 20,000

Therefore,

The accounting equation is:

Assets (Rs. 1,75,000 - Rs. 35,000) = Liabilities (Rs. 45,000 + Rs. 5,000) + Capital (Rs. 20,000)

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