You are looking for a new cell phone plan. The first company, Cellular-Tastic (f), charges a monthly fee of $35 and $0.11 per minute of use. Dirt-Cheap Cell (g) charges a monthly fee of $55 and $0.01 per minute of use.
a. How many minutes would you need to use for the cell phones to cost the same amount?
b. Create a graph to model this situation and describe the graph in writing in the space provided. Include the general shape and any intersections or intercepts.
c. Using your graph, explain when each company would be a better option.

By mathematical induction, we have proved that for any positive integer n, 4 evenly divides 11n - 7n.

WHat is Divisibility?

Divisibility is a mathematical property that describes whether one number can be divided evenly by another number without leaving a remainder. If a number is divisible by another number, it means that the division process results in a whole number without any remainder. For example, 15 is divisible by 3

To prove that 4 evenly divides 11n - 7n for any positive integer n, we can use mathematical induction.

Base Case:

When n = 1, 11n - 7n = 11(1) - 7(1) = 4, which is divisible by 4.

Inductive Step:

Assume that 4 evenly divides 11n - 7n for some positive integer k, i.e., 11k - 7k is divisible by 4.

We need to prove that 4 evenly divides 11(k+1) - 7(k+1), which is (11k + 11) - (7k + 7) = (11k - 7k) + (11 - 7) = 4k + 4.

Since 4 evenly divides 4k, and 4 evenly divides 4, it follows that 4 evenly divides 4k + 4.

By mathematical induction, we have proved that for any positive integer n, 4 evenly divides 11n - 7n.

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We need to calculate the z-score and then use a z-table to find the proportion of scores smaller than X = 35 in the normal distribution with a mean (µ) of 40 and a standard deviation (σ) of 10.
The z-score formula is: z = (X - µ) / σ

For X = 35, µ = 40, and σ = 10, the z-score is:
z = (35 - 40) / 10 = -0.5

Now, you need to look up the z-score (-0.5) in a z-table, which gives you the proportion of scores smaller than X = 35. The value associated with a z-score of -0.5 is 0.3085.
So, the correct answer is: a. 0.3085

Now, we can use the standard normal distribution table or a calculator with a normal distribution function. We know that the mean of the distribution is 40 and the standard deviation is 10. We want to find the proportion of scores that are smaller than X = 35.

First, we need to standardize the value of 35 using the formula:

z = (X - µ) / Ï

where X is the value we want to standardize, µ is the mean, and Ï is the standard deviation.

Plugging in the values we have:

z = (35 - 40) / 10 = -0.5

This means that a score of 35 is 0.5 standard deviations below the mean.

Next, we can use the standard normal distribution table or a calculator to find the proportion of scores that are smaller than z = -0.5. Using the table or calculator, we find that this proportion is 0.3085.

Therefore, the answer is (a) 0.3085.

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Answer:

5(8a + 9)

Step-by-step explanation:

40 and 45 can both be divided by 5, so this is a common factor.

-> 40 divided by 5 is 8

       [] It has a variable, so it will be 8a

-> 45 divided by 5 is 9

Our final answer is 5(8a + 9)

-> To check we can multiply it out, 5 * 8a is 40a, 5 * 9 = 45

-> This works

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

Velocity of jet in still air is 647 miles per hour and velocity of wind is 70 miles per hour.

Given,

Jet's velocity against wind 1731 / 3 = 577  mile per hour

flying with wind it   2151 / 3 = 717 miles per hour.

Let the velocity of jet in still air be x miles per hour and velocity of wind be y miles per hour.

As such its velocity against wind is x−y and with wind is x+y and therefore

x−y=577;

x+y=717

Adding the two

2x = 1294

x = 647

y= 717 − 647

y = 70

Hence velocity of jet in still air is 647 miles per hour and velocity of wind is 70 miles per hour.

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Answer:

28.65 yds (If you have to round do 29)

Step-by-step explanation:

a^2 + b^2 = c^2

14^2 + 25^2 = c^2

196 + 625 = 821

since c is squared you have to find the square root of 821

821 squared equals 28.65 yards

In summary, fy(a,b) is the slope of the tangent line to the surface defined by f(x, y) at the point (a, b) in the y-direction.

The given expression represents the partial derivative of f(x, y) with respect to y, evaluated at (a, b):

fy(a,b) = lim┬(y→b)⁡〖[f(a,y) - f(a,b)]/(y - b)〗

Geometrically, this partial derivative represents the slope of the tangent line to the surface defined by f(x, y) at the point (a, b) in the y-direction.

To see why this is the case, consider the following argument:

Let L be the limit in the expression given above.

Let h = y - b be the change in the y-coordinate from b to y.

Then, we can rewrite the limit as:

fy(a,b) = lim┬(h→0)⁡〖[f(a,b + h) - f(a,b)]/h〗

This expression represents the average rate of change of f(x, y) with respect to y over the interval [b, b + h].

As h approaches 0, this average rate of change approaches the instantaneous rate of change, which is the slope of the tangent line to the surface defined by f(x, y) at the point (a, b) in the y-direction.

Therefore, fy(a,b) is the partial derivative of f(x, y) with respect to y, evaluated at (a, b).

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Step 1: The expected value of the proposition is approximately -$9.33.

Step 2: If you played this game 711 times, you would expect to lose approximately $6620.63.

Step 1: The expected value of the proposition can be calculated by multiplying the probability of winning by the corresponding payoff and subtracting the probability of losing multiplied by the corresponding loss. In this case, the probability of drawing a card with a value of two or less from a standard deck is 3/52 (3 cards out of 52), and the payoff is $452. The probability of not drawing such a card is 49/52 (49 cards out of 52), and the loss is $35. Therefore, the expected value is (3/52) * $452 + (49/52) * (-$35) ≈ -$9.33.

Step 2: If the game is played 711 times, the expected total value can be obtained by multiplying the expected value of a single game by the number of times played. In this case, the expected total value would be approximately -$9.33 * 711 = -$6620.63. Therefore, if you played this game 711 times, you would expect to lose approximately $6620.63

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There are 65900 square centimetres present in a backyard garden that has an area of 6.59 square meters.

Scientific notation is the way through which a very small or a very large number can be written in shorthand. In scientific notations when a number is between 1 and 10s, it is multiplied by a power of 10.

For example, 6,500,000,000,000 can be written as 6.5 × 10¹².

To calculate a square meter value to the related value in cm², just multiply the quantity in m² by 10000 (the conversion factor). Here is the formula for it:

Value in cm² = value in m² × 10000

We need to convert 6.59 m² into cm². Using the conversion formula above, we will get:

Value in cm² = 6.59 × 10000 = 65900 cm²

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The given bounded region is the set

\(R = \left\{(x,y) ~:~ 0 \le x \le 1 \text{ and } x^4 \le y \le x^{1/4} \right\}\)

assuming the curves are \(y=x^4\) and \(x=y^4\implies y=x^{1/4}\) (since \(x>0\) in the first quadrant).

The coordinates of the centroid are \((\bar x, \bar y)\) where \(\bar x\) and \(\bar y\) are the average values of \(x\) and \(y\), respectively, over the region \(R\). These are given by the ratios

\(\bar x = \dfrac{\displaystyle \iint_R x \, dA}{\displaystyle \iint_R dA} \text{ and } \bar y = \dfrac{\displaystyle \iint_R y\,dA}{\displaystyle \iint_R dA}\)

Compute the area of \(R\).

\(\displaystyle \iint_R dA = \int_0^1 \int_{x^4}^{x^{1/4}} dy \, dx \\\\ ~~~~~~~~ = \int_0^1 \left(x^{1/4} - x^4\right) \, dx \\\\ ~~~~~~~~ = \frac45 - \frac15 = \frac35\)

Integrate \(x\) and \(y\) over \(R\).

\(\displaystyle \iint_R x \, dA = \int_0^1 \int_{x^4}^{x^{1/4}} x \, dy \, dx \\\\ ~~~~~~~~ = \int_0^1 x \left(x^{1/4} - x^4\right) \, dx \\\\ ~~~~~~~~ = \int_0^1 \left(x^{5/4} - x^5\right) \, dx \\\\ ~~~~~~~~ = \frac49 - \frac16 = \frac5{18}\)

\(\displaystyle \iint_R y \, dA = \int_0^1 \int_{x^4}^{x^{1/4}} y \, dy \, dx \\\\ ~~~~~~~~ = \frac12 \int_0^1 \left((x^{1/4})^2 - (x^4)^2\right) \, dx \\\\ ~~~~~~~~ = \frac12 \int_0^1 \left(x^{1/2} - x^8\right) \, dx \\\\ ~~~~~~~~ = \frac12 \left(\frac23 - \frac19\right) = \frac5{18}\)

Then the centroid's coordinates are

\(\bar x = \dfrac{\frac5{18}}{\frac35} = \boxed{\frac{25}{54}} \approx 0.463\)

\(\bar y = \dfrac{\frac5{18}}{\frac35} = \boxed{\frac{25}{54}}\)

Answer:

1/4

Step-by-step explanation:

First is use the properties of radicals.

Second is reduce the fraction

Third Simplify the expression

Fourth is Evaluate

So the answer is 1/4 or in alternative form 0.25, 2 raise to -2

The winch needs to rotate approximately 10 times to roll in 5 feet of cable.

To find out how many times the winch needs to rotate, we first need to determine the length of cable that is being wound around the drum. We know that the diameter of the drum is 5 inches, so we can calculate the circumference of the drum:

Circumference = π × diameter = π × 5 inches = 15.71 inches

Next, we need to convert the 5 feet of cable into inches so that we can compare it to the circumference of the drum:

5 feet × 12 inches/foot = 60 inches

Now that we have both values in inches, we can divide the total length of the cable by the circumference of the drum to find out how many times the winch needs to rotate:

60 inches ÷ 15.71 inches = 3.83

Since the winch needs to rotate a full rotation each time the cable is wound around the drum, we will round up to the nearest whole number, which is 4.

So, the winch needs to rotate approximately 10 times to roll in 5 feet of cable.

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Answer:

1) Add/Subtract the same quantity to/from both sides.

2)Yes.

Step-by-step explanation:

We can get equation B from equation A by adding /subtracting the same quantity to/from both sides.

Both the linear equations have same solution.

A linear equation is an equation that has one or multiple variable with the highest power of the variable is 1.

Given linear equations are:

A. 3x - 1 = 7

B. 3x = 8

1. We can get equation B from equation A by adding '1' on either side.

2.Equation A and equation B are same equations. Therefore, they have the same solution.

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Answer:

none

Step-by-step explanation:

This shape has no right angles

step 1

Calculate the average of the numbers

so

average=1,962.2/20

average=98.11

step 2

Subtract the mean from each number and Square each of the differences

so

(98.0-98.11)^2=0.0121

(98.4-98.11)^2=0.0841

(97.4-98.11)^2=0.5041

(97.0-98.11)^2=1.2321

(96.5-98.11)^2=2.5921

.

.

.

.step3

Add up all of the results from Step 2 to get the sum of squares

step 4

Divide the sum of squares, by the number of numbers minus one ( in this problem divided by 19)

step 5

Take the square root to get the result, this number s the sample standard deviation

If you treat upper- and lower-case differently , you have the following options:

26 upper-case letters

26 lower-case letters

10 digits

You can use any of the these 62 characters in any one of 8 positions, which gives you the following:

628=218,340,105,584,896  unique passwords. That’s over 200 TRILLION possibilities.

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The smallest possible inside length of the cubical steel tank that can hold 275 liters of water is approximately 0.640 meters.

The side length of the cube is found by converting the volume of water from liters to cubic meters, as the unit of measurement for the side length is meters.

Given that the volume of water is 275 liters, we convert it to cubic meters by dividing it by 1000 (1 cubic meter = 1000 liters):

275 liters / 1000 = 0.275 cubic meters

Since a cube has equal side lengths, we find the side length by taking the cube root of the volume. In this case, we find the cube root of 0.275 cubic meters:

∛(0.275) ≈ 0.640

Rounded to the nearest 0.001 meters, the smallest possible inside length of the tank is approximately 0.640 meters.

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The amount of money that will be removed from the account is B. $48.

From the information, the bank charges an out-of-network service fee of $4.00, and you withdraw $40 from each of two out-of-network ATMs.

Since the withdrawal was made in 2 places, the total amount removed will be:

= Amount withdrawn + Charge

= $40 + ($4 × 2)

= $40 + $8

= $48

The correct option is B

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Let S be a finite set of distinct non-zero vectors in R12, where |S| = 14. Then the vectors in S are linearly dependent.

Explanation: Linear dependence of a set of vectors means that the vector equation is not true if and only if all the coefficients are zero. Linear independence of a set of vectors means that the vector equation is true if and only if all the coefficients are zero.

If the number of vectors in the set S is greater than the dimension of the vector space, then the vectors must be linearly dependent. Therefore, the vectors in S are linearly dependent.

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The height of wall where the ladder will reach is 17.21 foot according to the angle and length of ladder.

The ladder, wall and ground will form a right angled triangle. Thus, height will be calculated based on the angle. So, sin theta = perpendicular/hypotenuse.

Perpendicular is the wall and hypotenuse is the length of ladder. Now,

sin 73° = perpendicular/18

Perpendicular = 18 × 0.96

Multiply the values on Right Hand Side of the equation

Perpendicular = 17.21 foot

Therefore, the length of the wall is 17.21 foot where ladder will reach.

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x2 = -2.0000. In this way, we get x2, the second approximation to the root of the equation using Newton's method with an initial approximation x1 = −2.

Newton's method is one of the numerical methods used to estimate the root of a function.

The following are the steps for using Newton's method:

Let the equation f (x) = 0 be given with an initial guess x1, and let f′(x) be the derivative of f(x).

Determine the next estimate, x2, by using the formula x2 = x1 - f (x1) / f'(x1).

Therefore, the given equation is x³ + x + 6 = 0.

Let us use Newton's method to solve the given equation. We have x1 = -2, which is the initial approximation.

Therefore, f(x) = x³ + x + 6, and f'(x) = 3x² + 1.

To find x2, the second approximation to the root of the equation, we need to substitute the values of f(x), f'(x), and x1 into the formula x2 = x1 - f (x1) / f'(x1).

Substituting the given values in the above equation we get, x2 = x1 - f (x1) / f'(x1) = -2 - (-2³ - 2 + 6) / (3(-2²) + 1) = -2 - (-8 - 2 + 6) / (3(4) + 1) = -2 - (-4) / 13 = -2 + 4 / 13 = -26 / 13

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Answer:

0.5

Step-by-step explanation:

4 is in the tenths place and 6 is in the hundredths place

Since the digit in the hundredths place (6) is greater than or equal to 5, add 1 to the digit in the tenths place (4)

1 + 4 = 5, so the digit in the tenths place becomes 5

The digit in the hundredths place is dropped

0.46 rounded to the nearest tenth (one decimal place) = 0.5

The possible rational roots of P(x).

According to the Rational Root Theorem, the possible rational roots of P(x) are the fractions ±p/q, where p is a factor of the constant term (-7) and q is a factor of the leading coefficient (3). The possible values for p are ±1 and ±7, and the possible values for q are ±1 and ±3. Therefore, the possible rational roots of P(x) are:

±1/1 = ±1
±7/1 = ±7
±1/3 = ±1/3
±7/3 = ±7/3

So, the possible rational roots of P(x) are ±1, ±7, ±1/3, and ±7/3.

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Answer:

x = -3, 6

Step-by-step explanation:

First, add 18 to both sides

x² - 3x - 18 = 0

           + 18    + 18

x² - 3x = 18

Add 9/4 to both sides because that is the square of half of -3

x² - 3x + 9/4 = 18 + 9/4

Multiply both sides by 4 to get rid of the fractions

(x² - 3x + 9/4 = 18 + 9/4)4

4x² - 12x + 9 = 72 + 9 = 81

Factor the left side of the equation

(2x - 3)² = 81

√(2x - 3)² = √81

Because of the square root, this will result in a positive number and a negative number

2x - 3 = 9

2x - 3 = -9

For both equations, add 3 to both sides then divide by 2

2x - 3 = 9

     + 3   +3

2x = 12

2x/2 = 12/2

x = 6

2x - 3 = -9

    + 3   + 3

2x = -6

x = -3

Answer:

When two variables move in the same direction, the curve relating them is called a positive or direct relationship.

Step-by-step explanation:

When two variables move in the same direction, it indicates a positive or direct relationship between them. In this context, a positive relationship means that as one variable increases, the other variable also tends to increase, and as one variable decreases, the other variable tends to decrease.

When we plot the values of the two variables on a graph, a positive relationship is typically represented by a curve that slopes upward from left to right. This curve is often referred to as an increasing or upward-sloping curve.

The degree or strength of the positive relationship can vary. It can be strong, where the variables show a clear and consistent increase or decrease together, or it can be weak, where the increase or decrease is more gradual or scattered.

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The average length encoding of a letter for a Huffman code of the letters and their given frequencies will be 245.

We have,

Frequencies:

a = 0.15 = 15,

b = 0.25 = 25,

c = 0.20 = 20,

d = 0.35 = 35,

e = 0.05 = 5,

So,

Now,

According to the question,

We will make Huffman tree,

i.e.

a = 0.15 = 15,

b + c = 25 + 20 = 45

d + e = 35 + 5 = 40,

Now,

a + b + c + d + e = 100

So,

a = 11 = 2 digits

b = 101 = 3 digits

c= 100 = 3 digits

d= 01 = 2 digits

e= 00 = 2 digits

And,

We know that,

Total bits required to represent Huffman code = 12.

So,

Now,

The average code length = a * 2 digits + b * 3 digits + c * 3 digits + d * 2 digits + e * 2 digits

i.e.

The average code length = 15 × 2 + 25 × 3 + 20 × 3 + 35 × 2 + 5 × 2

On solving we get,

The average code length = 245

Hence we can say that the average length encoding of a letter for a Huffman code of the letters and their given frequencies will be 245.

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Heidi is able to walk 10/3 miles in 1 hour (60 min).

It is a method for determining the value of a single unit by subtracting the value of multiple units and subtracting the value of multiple units from of the value of a single unit.

Now, for the given question;

It takes Heidi 12 minutes to walk 2/3 miles.

Applying the unitary method.

Then, for in 1 minutes Heidi will walk = 2/(3×12).

For walking in 1 hour or 60 min =  (2×60)/(3×12).

Further simplifying;

In 1 hour = 10/3 miles.

Therefore, Heidi would be be able to walk 10/3 miles in 1 hour.

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Step-by-step explanation:

-3 +(-3)

= -3 -3

True because (+)(-) = -

There are various ways to represent the negation of a statement, or proposition p. One possible method is to use the symbol ~. Therefore, the negation of proposition p would be represented as ~p.

Similarly, if the proposition p is defined as "it is not snowing," then the negation of p, or not-p, would be represented as ~p or "it is snowing." This is because the negation of "it is not snowing" is "it is snowing."Thus, the equivalent proposition of not-p is "it is snowing." In summary, the negation of any statement p is a proposition that is the opposite of p. The negation of "it is not snowing" would be "it is snowing."Long explanation:For any statement p, there are different ways to express its negation or opposite. One way is to use the logical negation symbol, which is ~.

If p is the proposition "it is not snowing," then the negation of p or not-p would be represented as ~p or "it is snowing." This is because the negation of a negative statement is a positive statement. For instance, if we negate the statement "I am not happy," the result would be "I am happy." Likewise, if we negate the statement "it is not snowing," we would obtain "it is snowing."Therefore, the equivalent proposition to not-p is "it is snowing." This is because not-p is the negation of p, which means that it is the opposite of p. Since p is "it is not snowing," then not-p would be "it is snowing."

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Answer:

1. y = -x + 2, slope = -1, y-intercept = 2

  y = -x + 3, slope = -1, y-intercept = 3

2. When lines have the same slope and different y-intercepts they are parallel lines. Parallel lines never intercept. Because these lines never intercept, they have no solution.