Rework the problem so that you pay off the lower interest card first. 5) How much money do you save by paying off the higher interest card first?

Answer:

825 miles

Step-by-step explanation:

275 x 3 = 825

Helping in the name of Jesus.

After solving by linear programming, the business needs create 100 Type I pencils and 80 Type II pencils to increase revenue.

LINEAR PROGRAMMING: WHAT IS IT?

A mathematical method called linear programming is used to maximise a linear objective function under the restrictions of linear equality and inequality. In a mathematical model whose requirements are expressed by linear connections, it is used to identify the best result.

With linear programming, this issue can be resolved.

Please define x as the quantity of Type I pencils produced and y as the quantity of Type II pencils produced.

Profit = 3x + 5y is the formula for the goal function.

2x + 5y 660 are the restrictions (sanding constraint)

(Polishing constraint): x ≥0 y≥ 0; 6x + 3y 730

Under these limitations, we wish to maximize the profit function.

The largest profit comes when x = 100 and y = 80,

with a profit of $740, according to software that can solve linear programming issues or a graphing calculator.

Thus, the business needs create 100 Type I pencils.80pencil for type II

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Part A: The system of equations represented by the graph: y = 3x - 5 and 2x + 4y = 8.

Part B: The solution of the system of equations : (2, 1).

Determining the significance of the variables employed in a system of equations entails solving the set of equations.

A specific system of equations may have a variety of solutions,

Let's examine three approaches to solving a set of equations, presuming that they are linear equations with two variables.

From the graph shown.

The blue line shows the equation: 2x + 4y = 8

At x =0, y= 2

At y =0, x = 4

Red line shows the equation: y = 3x - 5

At x = 0, y = -5.

Part B: solution to the system of equations.

From the graph, where two lines intersect is the solution of the system of equations.

That is point (2,1).

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The experimental probability that the next student will register for German is 9/79.

What is probability?

To find the experimental probability that the next student will register for German, we need to divide the number of students who have registered for German by the total number of students who have registered so far:

P(German) = number of students who have registered for German / total number of students who have registered

P(German) = 108 / (108 + 360 + 21 + 459) [Adding all the students who registered for each language]

P(German) = 108 / 948

P(German) = 9/79

Therefore, the experimental probability that the next student will register for German is 9/79.

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Answer:

Step-by-step explanation:

Starting with 72x5/12:

72x5/12 = (72/12) x 5 (simplifying the fraction)

= 6 x 5

= 30

Now, we have:

30 = ?x5x1/12

Multiplying both sides by 12, we get:

30 x 12 = ? x 5 x 1

360 = ? x 5

Dividing both sides by 5, we get:

72 = ?

Therefore, the missing value is 72.

Answer: 15 inches

Step-by-step explanation:

An equilateral triangle has three equal sides, so if the perimeter of the triangle is 45 inches, then each side must be 45 inches divided by 3, which gives us:

45 in ÷ 3 = 15 in

Therefore, the length of each side of the flag is 15 inches.

Five-number summary: Minimum = 30, Q1 = 35, Median = 50, Q3 = 65, Maximum = 70. Bοx and whisker plοt: Bοx spans frοm 35 tο 65 with median at 50, whiskers extend frοm 30 tο 70, nο οutliers.

Tο find the five-number summary and cοnstruct a bοx and whisker plοt, we need tο first οrganize the given data in ascending οrder:

30, 40, 50, 60, 70

The five-number summary cοnsists οf the minimum value, the first quartile (Q1), the median (Q2), the third quartile (Q3), and the maximum value.

Minimum value: 30

Q1 (first quartile): the median οf the lοwer half οf the data set, which is (30 + 40)/2 = 35

Median (Q2): the middle value οf the data set, which is 50

Q3 (third quartile): the median οf the upper half οf the data set, which is (60 + 70)/2 = 65

Maximum value: 70

Sο, the five-number summary is:

Minimum = 30

Q1 = 35

Median = 50

Q3 = 65

Maximum = 70

To construct a box and whisker plot, we draw a number line that includes the range of the data (from the minimum value to the maximum value), and mark the five-number summary on the number line. Then we draw a box that spans from Q1 to Q3, with a vertical line inside the box at the median (Q2). In addition, we draw "whiskers" from the box to the minimum and maximum values.

The box and whisker plot for the given data is as follows:

       20         40         60         80        100

       |----------|----------|----------|----------|

                   +-----+                    

                   |     |                    

                   |     |                    

                   |     |                    

                   |     |                    

                   +-----+                    

The box spans from 35 to 65, with a vertical line inside the box at 50. The whiskers extend from 30 to 70. There are no outliers in the data, so there are no points beyond the whiskers.

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Answer:

The answer to your question is $2.55

Step-by-step explanation:

85% × $3 = $2.55

With original price $3 and 85% off,

Final price: $0.45

Saved amount: $2.55

I hope this helps and have a wonderful day!

Answer:0.45

Step-by-step explanation:

Purchase Price:

$3

Discount:

(3 x 85)/100 = $2.55

Final Price:

3 - 2.55 = $0.45

Samantha waters her tomato plants once a week with between 15 and 60 gallons of water.

Domain refers to the set of possible values that the independent variable can take. In this case, the domain is the range of possible amounts of water that Samantha can use to water her tomato plants, which is 15 to 60 gallons.

The independent variable is the variable that is being manipulated or controlled by Samantha, which in this case is the amount of water used to water the tomato plants. So, the independent variable is "gallons of water used".

The dependent variable is the variable that is being measured or observed, which in this case is the number of tomatoes produced each week. So, the dependent variable is the "number of tomatoes produced".

Therefore, the answer is:

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The top and lower sums for n =2,4, and 8 and f(x) = 2 +sin(x),0  x   are as follows:

n = 2: Upper Sum = 7.85398; Lower sum ≈ 7.85398

n = 4: Upper sum ≈ 6.43917; Lower sum ≈ 6.43917

n = 8: Upper sum ≈ 6.35258; Lower sum ≈ 6.352

It is necessary to first divide the range [0, ] into n subintervals of identical width x, where x = ( - 0)/n = /n, in order to calculate the upper and lower sums for the equations f(x) = 2 + sin(x), 0 x for n = 2, 4, and 8. The endpoints of these subintervals are:

x0 = 0, x1 = Δx, x2 = 2Δx, ..., xn-1 = (n-1)Δx, xn = π.

Then, for each subinterval [xi-1, xi], we can approximate the area under the curve by the area of a rectangle whose height is either the maximum or minimum value of f(x) on that interval. The sum of these areas' overall subintervals gives us the upper and lower sums.

For n = 2:

[0, π/2]: f(π/2) = 2 + sin(π/2) = 3

[π/2, π]: f(π) = 2 + sin(π) = 2

[0, π/2]: f(0) = 2 + sin(0) = 2

[π/2, π]: f(π/2) = 2 + sin(π/2) = 3

For n = 4:

[0, π/4]: f(π/4) = 2 + sin(π/4) ≈ 2.70711

[π/4, π/2]: f(π/2) = 2 + sin(π/2) = 3

[π/2, 3π/4]: f(3π/4) = 2 + sin(3π/4) ≈ 2.29289

[3π/4, π]: f(π) = 2 + sin(π) = 2

[0, π/4]: f(0) = 2 + sin(0) = 2

[π/4, π/2]: f(π/4) = 2 + sin(π/4) ≈ 2.70711

[π/2, 3π/4]: f(π/2) = 2 + sin(π/2) = 3

[3π/4, π]: f(3π/4) = 2 + sin(3π/4) ≈ 2.29289

For n = 8:

[0, π/8]: f(π/8) = 2 + sin(π/8) ≈ 2.25882

[π/8, π/4]: f(π/4) = 2 + sin(π/4) ≈ 2.70711

[π/4, 3π/8]: f(3π/8) = 2 + sin(3π/8) ≈ 2.96593

[3π/8, π/2]: f(π/2) = 2 + sin(π/2) = 3

[π/2, 5π/8]: f(5π/8) = 2 + sin(5π/8) ≈ 2.96593

[5π/8, 3π/4]: f(3π/4) = 2 + sin(3π/4) ≈ 2.70711

[3π/4, 7π/8]: f(7π/8) = 2 + sin(7π/8) ≈ 2.25882

[7π/8, π]: f(π) = 2 + sin(π) = 2

[0, π/8]: f(0) = 2 + sin(0) = 2

[π/8, π/4]: f(π/8) = 2 + sin(π/8) ≈ 2.25882

[π/4, 3π/8]: f(π/4) = 2 + sin(π/4) ≈ 2.70711

[3π/8, π/2]: f(3π/8) = 2 + sin(3π/8) ≈ 2.96593

[π/2, 5π/8]: f(π/2) = 2 + sin(π/2) = 3

[5π/8, 3π/4]: f(5π/8) = 2 + sin(5π/8) ≈ 2.96593

[3π/4, 7π/8]: f(3π/4) = 2 + sin(3π/4) ≈ 2.70711

[7π/8, π]: f(7π/8) = 2 + sin(7π/8) ≈ 2.25882

The complete question is:-

Unless specified, all approximating rectangles are assumed to have the same width. Evaluate the upper and lower sums for f(x) = 2 + sin(x),0 ≤ x ≤ π with n = 2, 4, and 8.

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The ratio of vegetable oil to water is  [tex]\frac{5}{8}[/tex] : 2 and the value of the ratio is 0.3125.

What is ratio?

By dividing two amounts of the same unit, it is possible to determine how much of one quantity is in the other. This is referred to as ratio in mathematics.

We are given that a particular recipe uses [tex]\frac{5}{8}[/tex] cup of vegetable oil and 2 cups of water.

So, from this, we get the ratio of vegetable oil to water as [tex]\frac{5}{8}[/tex] : 2.

Now, the value of the obtained ratio is

⇒ 0.625 : 2

⇒ 0.3125

Hence, the required solution has been obtained.

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Answer:

1) option A

2) p > 34

Step-by-step explanation:

1)  Inequality:   7 ≤ n + 5

Subtract 5 from both sides,

                  7 - 5 ≤ n +5 - 5

                    2 ≤ n

The value of n is all values greater than or equal to 2.

So, the answer is option A.

2) Inequality:   16 + p > 50

 Solution:

             Subtract 16 from both sides,

                  16 - 16 + p > 50 - 16

                                p > 34

The rule for f in the desired form is: f(x) = (3x^2 + 12x + 13r(x) + 52) / (x + 4)

To rewrite the rule for f in the form f(x) = q(x) + d(r), we need to first write g(x) in terms of r(x).

We know that g(x) = r(x) / (x + 4) + 1, so we can rewrite it as:

g(x) = r(x) / (x + 4) + (x + 4) / (x + 4)

g(x) = (r(x) + x + 4) / (x + 4)

Now, we can see that f(x) is a transformation of g(x) with q(x) = 3x and d(r) = 13. So, we can write:

f(x) = q(x) + d(r)

f(x) = 3x + 13(r(x) + x + 4) / (x + 4)

f(x) = (3x(x + 4) + 13r(x) + 52) / (x + 4)

Therefore, the rule for f in the desired form is: f(x) = (3x^2 + 12x + 13r(x) + 52) / (x + 4)

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The range, on the other hand, is affected by extreme values and may not be a good representation of the spread of the data in these cases.

What is Histogram ?

A histogram is a graphical representation of the distribution of a dataset. It is a way to display the frequency of occurrence of different values or ranges of values in a dataset.

The correct answer is IQR, because it is more robust to outliers and is not affected by extreme values like Range.

Although the question provides information about the shape of the histograms, it does not indicate whether the distributions are symmetric or skewed. Therefore, the choice of IQR over Range is not based on the shape of the data but on the fact that IQR is a more appropriate measure of variability when dealing with skewed data or data with outliers.

In general, the IQR is a better measure of variability than the range when the data is skewed or contains outliers, as it only considers the middle 50% of the data and is not affected by extreme values.

Therefore, The range, on the other hand, is affected by extreme values and may not be a good representation of the spread of the data in these cases.

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So the area of the living room on the scale drawing is 334128.48 square centimeters.

Area is a measure of the size of a two-dimensional surface or region, typically expressed in square units. It is the amount of space inside a flat, enclosed shape or surface, and is calculated by multiplying the length and width of the shape or surface. For example, the area of a rectangle can be calculated by multiplying its length by its width, while the area of a circle can be calculated by multiplying pi (3.14) by the square of its radius. Area is a fundamental concept in mathematics and is used in a wide range of fields, from geometry and physics to engineering and architecture.

Here,

First, we need to determine the actual dimensions of the living room. Since each 4 cm on the scale drawing is equal to 8 feet, we can set up a proportion:

4 cm : 8 feet = 12 cm : x

Solving for x, we get:

x = (12 cm x 8 feet) / 4 cm

= 24 feet

So the actual length and width of the living room are 24 feet and 24 feet, respectively.

The area of the living room is then:

Area = length x width

= 24 feet x 24 feet

= 576 square feet

Now, we need to determine the area of the living room on the scale drawing. Since the length and width of the scale drawing are both 12 cm, the area is:

Area = length x width

= 12 cm x 12 cm

= 144 square cm

Finally, we can determine the scale factor for the area by dividing the actual area by the scale area:

Scale factor = actual area / scale area

= 576 square feet / 144 square cm

Since we need the area in square centimeters, we can convert square feet to square centimeters by multiplying by 929.03:

Scale factor = (576 square feet / 144 square cm) x (929.03 square cm/square feet)

= 2324.12

Therefore, the area of the living room on the scale drawing is:

Area = scale area x scale factor

= 144 square cm x 2324.12

= 334128.48 square cm

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Answer:

The selling price of the automobile after the $500 rebate is:

$18,340 - $500 = $17,840

The markdown is the difference between the original selling price and the selling price after the rebate, expressed as a percentage of the original selling price. The markdown can be calculated as follows:

Markdown = [(Original Price - Discounted Price) / Original Price] × 100%

Markdown = [(18,340 - 17,840) / 18,340] × 100%

Markdown = (500 / 18,340) × 100%

Markdown ≈ 2.72%

Rounding to the nearest tenth of a percent, the percent markdown is approximately 2.7%.

Answer:

[tex]v = \frac{28\pi}{3} [/tex]

Step-by-step explanation:

First, we can find the area of the cone's base:

[tex]a(base) = \pi \times {r}^{2} = 4\pi[/tex]

Now, let's find the volume:

[tex]v = \frac{1}{3} \times a(base)\times h[/tex]

[tex]v = \frac{1}{3} \times 4\pi \times 7 = \frac{28\pi}{3} [/tex]

The Triangle Proportionality Theorem, also known as the Side Splitter Theorem, states that if a line is parallel to one side of a triangle, then it divides the other two sides proportionally.

Triangle Proportionality Theorem:

To prove this theorem, we begin by drawing a ΔABC with a line DE parallel to side AB. We then draw lines BD and CE, which intersect the parallel line DE at points F and G, respectively. By the properties of parallel lines, we know that ∠ADE and ∠ABD are congruent, and ∠AED and ∠ADB are congruent. Similarly, ∠CDE and ∠BDC are congruent, and ∠CED and ∠DCB are congruent.

We can then use the properties of similar triangles to show that ΔADE and ΔABC are similar, as are  ΔCDE and ΔACB. This means that the ratios of corresponding side lengths are equal:

BA/DE = CA/CE and CB/DE = AB/BD

We can then substitute CA - BA for CB in the first equation, and BD for AB in the second equation:

BA/DE = (CA - BA)/CE and CB/DE = BD/(CA - BA)

Cross-multiplying both equations, we obtain:

BA * CE = DE * (CA - BA) and CB * DE = BD * (CA - BA)

Adding the two equations, we get:

BA * CE + CB * DE = (DE + CE) * CA

Dividing both sides by CB * DE, we obtain:

BA/CB = (DE + CE)/CE * CA/DE = DE/CD

Thus, we have proven the Triangle Proportionality Theorem.

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Answer:

Step-by-step explanation:

For question 3,

Simplified brackets -> (8+11)2-8+11

Open brackets -> 19*2-8+11

Multiply -> 38-8+11

Calculate -> 41

Solution = 41

For question 4,

Remove Brackets -> m+11+m+44

Put common numbers together -> m+n+44+11

Calculate -> m+55+n

Solution = m+55+n

-Your smart 6th grader

Answer:27499.975

Step-by-step explanation:

Answer:

C)  decreasing then increasing.

Step-by-step explanation:

A function is said to be increasing if the y-values increase as the x-values increase.

A function is said to be decreasing if the y-values decrease as the x-values increase.

From inspection of the given graph of y = x², we can see that for the first half of the graph, the y-values are decreasing as the x-values increase. Therefore, the function is decreasing for this part of the graph.

Similarly, for the second half of the graph, we can see that the y-values are increasing as the x-values increase. Therefore, the function is increasing for this part of the graph.

So the description of the graph of the function is:

The conclusion about p using an absolute value inequality is in the range of 29.8% to 34.2%.

What is absolute value inequality?

An expression using absolute functions and inequality signs is known as an absolute value inequality.

We know that the absolute value inequality about p using an absolute value inequality is written as,

[tex]|p-\hat{p}|\leq E[/tex]

where E is the margin of error and is the sample proportion.

Now, it is given that the poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76%. Therefore, p can be written as,

[tex]|p-0.72|\leq 0.04\\(0.72-0.04)\leq p\leq (0.72+0.04)\\\\0.68 \leq p \leq 0.76[/tex]

Thus, the p is most likely to be between the range of 68% to 76%.

Similarly, the proportion of people who like dark chocolate more than milk chocolate was 32% with a margin of error of 2.2%. Therefore, p can be written as,

[tex]|p-0.32| \leq 0.022\\\\0.248 \leq p \leq 0.342[/tex]

Thus, the p is most likely to be between the range of 29.8% to 34.2%.

Hence, the conclusion about p using an absolute value inequality is in the range of 29.8% to 34.2%.

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Answer:

Step-by-step explanation:

In the given figure, we have three circles arranged such that they touch each other. Let the centers of these circles be A, B, and C, with radii 5.4, 4.4, and 3.4, respectively.

We can see that triangle ABC is an equilateral triangle, since all sides are of equal length (the radii of the circles).

To find the angle A, we can use the law of cosines, which states that:

c^2 = a^2 + b^2 - 2ab cos(C)

where a, b, and c are the lengths of the sides of a triangle, and C is the angle opposite the side of length c.

Since triangle ABC is equilateral, we have a = b = c, and C = 60°. Therefore, we can rewrite the above equation as:

c^2 = 2a^2 - 2a^2 cos(60°)

Simplifying and solving for a, we get:

a = c / sqrt(3)

Substituting the given values, we have:

a = 4.4 / sqrt(3) ≈ 2.54

Therefore, angle A is:

A = 180° - 60° - 60° = 60°

And angle B is:

B = 180° - A = 120°

Finally, we can use the law of sines to find the length of side c:

sin(A) / a = sin(B) / b = sin(C) / c

Substituting the values we have found, we get:

sin(60°) / 2.54 = sin(120°) / c

Simplifying and solving for c, we get:

c = 2.54 / sqrt(3) / sin(120°) ≈ 3.71

Therefore, the length of side c is approximately 3.71, and angle B is 120°.

The linear inequality for the shaded region with slope -4 is:

[tex]y < -4x + 4[/tex]

In mathematics, a linear inequality is an inequality involving a linear function in one or more variables. It describes a region in the coordinate plane that satisfies the inequality.

In mathematics, the slope is a measure of the steepness of a line. It describes how much a line rises or falls as we move from left to right along it.

According to the given information,

To write the linear inequality for the graph passing through points (0,4) and (1,0), we need to find the equation of the line first.

The slope of the line passing through these two points is:

[tex]m = (y_{2} - y_{1} ) / (x_{2} - x_{1})[/tex]

= (0 - 4) / (1 - 0)

= -4

Using the slope-intercept form of a linear equation, y = mx + b, where m is the slope and b is the y-intercept, we can find the equation of the line passing through these two points:

[tex]y = -4x + 4[/tex]

Now, to write the linear inequality for this line, we need to determine which side of the line is shaded. We can use the test point (0,0) to check which side of the line contains the solutions to the inequality.

If we plug in (0,0) into the equation [tex]y = -4x + 4[/tex], we get:

0 = -4(0) + 4

0 = 4

Since 0 is not less than 4, the point (0,0) is not a solution to the inequality. Therefore, we need to shade the side of the line that does not contain the origin (0,0).

The linear inequality for the shaded region is:

[tex]y < -4x + 4[/tex]

So any point below the line [tex]y = -4x + 4[/tex]satisfies this inequality.

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At a 5% level of significance, we reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis that the percentage of vegetarians in age group 18 to 35 years is higher than 5%.

To test the hypothesis that the percentage of vegetarians is higher in the age group 18 to 35 years at a 5% level of significance, we can use a hypothesis test with the following null and alternative hypotheses:

Null hypothesis (H0): The percentage of vegetarians in the age group 18 to 35 years is equal to 5%.

Alternative hypothesis (Ha): The percentage of vegetarians in the age group 18 to 35 years is greater than 5%.

We can conduct a one-tailed z-test to test this hypothesis, using the following formula:

z = (p - P0) / sqrt(P0 * (1 - P0) / n)

where:

p is the sample proportion of vegetarians in the age group 18 to 35 years

P0 is the hypothesized proportion (5%)

n is the sample size

We will reject the null hypothesis if the calculated z-value is greater than the critical z-value corresponding to a 5% level of significance (one-tailed test).

Assuming a sample of size n = 100, if we find that 10 people in the sample identify themselves as vegetarians, then the sample proportion is:

p = 10/100 = 0.1

Using the formula above, we can calculate the z-value:

z = (0.1 - 0.05) / sqrt(0.05 * 0.95 / 100) = 1.96

The critical z-value for a one-tailed test at a 5% level of significance is 1.645 .

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Answer:

[tex]u = \frac{2 \sqrt{6} }{3} [/tex]

[tex]v = \frac{ \sqrt{6} }{3} [/tex]

Step-by-step explanation:

Use trigonometry:

[tex] \tan(60°) = \frac{ \sqrt{2} }{v} [/tex]

Use the property of proportion to find v:

[tex]v = \frac{ \sqrt{2} }{ \tan(60°) } = \frac{ \sqrt{2} }{ \sqrt{3} } = \frac{ \sqrt{2} \times \sqrt{3} }{ \sqrt{3} \times \sqrt{3} } = \frac{ \sqrt{6} }{3} [/tex]

Use the Pythagorean theorem to find u:

[tex] {u}^{2} = {v}^{2} + ( { \sqrt{2} )}^{2} [/tex]

[tex] {u}^{2} = ( { \frac{ \sqrt{6} }{3}) }^{2} + ( { \sqrt{2} )}^{2} = \frac{6}{9} + \frac{2}{1} = \frac{6}{9} + \frac{2 \times 9}{9} = \frac{6}{9} + \frac{18}{9} = \frac{24}{9} = \frac{8}{3} [/tex]

[tex]u > 0[/tex]

[tex]u = \sqrt{ \frac{8}{3} } = \frac{2 \sqrt{6} }{3} [/tex]

The graph represents the equation with option C, tan x/2.

A graph is a structure that resembles a collection of objects in discrete mathematics, more specifically in graph theory, in which some pairs of the objects are conceptually "related." The objects are represented by mathematical abstractions known as vertices, and each set of connected vertices is referred to as an edge.

Here,

The graph of the function tan(x/2) represents the tangent of half of the angle x in radians.

The tangent function has vertical asymptotes at odd multiples of π/2, which means that the function is undefined at those points. Therefore, the graph has vertical asymptotes at x = π/2, 3π/2, 5π/2, ....

The function also has zeros at even multiples of π, which occur when tan(x/2) = 0. This happens when x/2 = kπ where k is an integer, so x = 2kπ.

Between each pair of vertical asymptotes, the function oscillates between positive and negative infinity. The function is positive in the intervals (2kπ, (2k+1)π) and negative in the intervals ((2k-1)π, 2kπ) for all integers k.

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The 90th percentile of the distribution for the time a CD player lasts is approximately 4.674 years.

In statistics, a percentile is a measure used to indicate the value below which a given percentage of observations falls in a dataset or distribution.

For example, the 90th percentile is the value below which 90% of the observations fall, and above which only 10% of the observations fall.

Similarly, the 50th percentile (also known as the median) is the value below which 50% of the observations fall, and above which 50% of the observations fall.

Here we have

The life of Sunshine CD players is normally distributed with a mean of 4.3 years and a standard deviation of 1.1 years.

To find the 90th percentile of the distribution for the time a CD player lasts, find the value of x such that 90% of the CD players last less than x and 10% last more than x.

First, standardize the distribution by converting it to a standard normal distribution with a mean of 0 and a standard deviation of 1.

This can be done by subtracting the mean and dividing by the standard deviation:

Z = (x - μ) / σ

To find the Z-score corresponding to the 90th percentile,

We can use a standard normal distribution table or a calculator.

The Z-score corresponding to the 90th percentile is approximately 1.28.

Now we can solve for x by rearranging the standardization equation above:

=> Z = (x - μ) / σ

=> 1.28 = (x - 4.3) / 1.1

=> 1.28 * 1.1 = x - 4.3

=> x = 4.674

Therefore,

The 90th percentile of the distribution for the time a CD player lasts is approximately 4.674 years.

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