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swat32
2 years ago
14

Megan’s TV had a base price of $189 and the sales tax was 6. 88%. Over the next four years, the TV consumed an average of $0. 06

of electricity every day. It also needed repairs twice, costing $29 each time. After four years, Megan got a new TV. What was the lifetime cost of Megan’s TV? (Remember that one in every four years is a leap year. ) a. $357. 68 b. $318. 66 c. $347. 66 d. $351. 65.
Mathematics
1 answer:
andreyandreev [35.5K]2 years ago
3 0

Lifetime cost of Megan's TV is sum of base price, tax, electricity cost and repair cost. The lifetime cost of Megan’s TV is $347.

<h3>What is lifetime cost of a product?</h3>

Lifetime cost it the overall cost of the product, which is expend over it during its service including base price, service charge, fuel charge etc.

Given information-

The base price of the TV is $189.

The daily consumption of electricity by the YV is$0.06

The cost of repairs each time is $29.

As The base price of the TV is $189 and the sales tax on it was 6.88 percent Thus the total base price of the TV at the time of buy is,

C_b=189\times\dfrac{106.88}{100}\\C_b=202.0032

Thus, the total base price of the TV at the time of buy is $202.0032.

As The daily consumption of electricity by the YV is$0.06. Thus the total cost of electricity used by TV in four years (including one leap year) is,

C_E=0.06\times(3\times365+366)\\C_E=87.66

Thus the total cost of electricity used by TV in four years is $87.6.

As the cost of repairs each time is $29 and need to be repair it twice. The total cost of repair is,

T_r=29\times2\\T_r=58

Thus the total cost of repair the TV is $58.

As the lifetime cost of TV is the sum all the cost in 4 year service of TV. Thus,

C_T=202.0032+87.66+58\\C_T\cong 347

Hence,  the lifetime cost of Megan’s TV is $347. Option C is the correct option.

Learn more about the lifetime cost here;

brainly.com/question/25820773

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Which situation could be represented by the graph?
Ymorist [56]

The correct option which resembles with the given graph is \fbox{\begin\\\ optionA and optionC\\\end{minispace}}.

Further explanation:

From the given graph the it is observed that the interval is [8,11) which is a half open interval or it can be said that it is a half closed interval.

A half closed or a half open interval is an interval in which one end point of the interval is included but the other point is not included.

For example:

In an interval of the form [a,b) the point a is included in the set but the point b is not included in the set.

Similarly, in the interval [8,11) the point 8 is included in the set but the point 11 is not included in the set.

In order to determine the correct option which resembles with given graph form interval for each option.

Option A:

As per the statement in option A the age of the student must be at least 8 years and not more than 11 years that is the age of the student is either 8 years or greater than 8 years and less than 11 years.

As per the above statement the interval formed is \fbox{\begin\\\ [8,11)\\\end{minispace}} in which 8 is included in the set and 11 is not included which means it is a half closed or half opoen interval.

Therefore, \fbox{\begin\\\ optionA\\\end{minispace}} is a correct option.

Option B:

As per the statement in option B the amount of money the babysitter can earn is between \$8 and \$11 per hour.

As per the above statement the interval formed is \fbox{\begin\\\ (8,11)\\\end{minispace}} in which both of the end points are not included in the set which means that it is an open interval.

Therefore, \fbox{\begin\\\ optionB\\\end{minispace}} is an incorrect option.

Option C:

As per the statement in option C the time required to complete a program in college cannot be less than 8 hours and the time must be less than 11 hours.

From the above statement it is concluded that the time required can be 8 hours or more than 8 hours but it has to be less than 11 hours.

So, as per the above the statement the interval formed is \fbox{\begin\\\ [8,11)\\\end{minispace}}.

Therefore, \fbox{\begin\\\ optionC\\\end{minispace}} is a correct option.

Option D:

As per the statement in option D the age of the dogs is either 8 years old or below 8 years and age of the dog must be greater than  11 tears.

As per the above statement the interval formed is \fbox{\begin\\\ (-\infty,8) \bigcup(11,\infty)\\\end{minispace}}.

Therefore, the \fbox{\begin\\\ optionD\\\end{minispace}} is an incorrect option.

So, \fbox{\begin\\\ optionA and optionC\\\end{minispace}} are the correct options which resembles with the given graph.

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  1. A problem on composite function brainly.com/question/2723982
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Answer details:

Grade: High school

Subject: Mathematics

Chapter: Sets

Keywords: Interval, set, open interval, closed interval, half open interval, half closed interval, set theory, program, community college, babysitters, veterinary clinic, ages, students.

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Answer:

The sample mean is

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The margin of error is

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Step-by-step explanation:

Deep explanation about a confidence interval

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

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Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645*215 = 353.675

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The upper end of the interval is the mean added to M. So it is 6.4 + 0.3944 = 6.74 hours.

In this problem:

The deep explanation is not that important.

We just have to recognize that the interval has a lower end and an upper end. The distance from both the upper and the lower end to the mean is M. This means that the sample mean is the halfway point between the lower end and the upper end.

The margin of error is the distance of these two points(lower and upper end) to the mean.

In our interval

Lower end: 3.23

Upper end: 3.87

Sample mean

M = \frac{3.23 + 3.87}{2} = 3.55

So the correct answer is:

b.3.55

The margin of error is

3.87 - 3.55 = 3.55 - 3.23 = 0.32

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F(x) = 3x + 5<br> Work out a if f(a)= -13
vekshin1

Answer:

a = - 6

Step-by-step explanation:

Given

f(x) = 3x + 5 , then

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3a + 5 = - 13 ( subtract 5 from both sides )

3a = - 18 ( divide both sides by 3 )

a = - 6

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Answer:

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Step-by-step explanation:

Given : On a map, the distance between two historical markers is 4.5 inches, and 2.5 inches represents 10 miles.  

To find : What is the actual distance between the historical markers?

Solution :

We have given that,

2.5 inches represents 10 miles.

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