two methods are used to predict how many customers will call in for help in the next four days. the first method predicts the numbers of callers to be 23, 5, 14, and 20 for the four respective days. the second method predicts 20, 13, 14, and 20 for the four respective days. the actual numbers of callers turn out to be 23, 10, 15, and 19. which method has the smaller mean absolute error (mae)?

The solution of the inequality is,

⇒ q = 11

We have to given that;

The inequality is,

⇒ 56 ≤ 3 + 6q

Now, We can simplify as;

⇒ 56 ≤ 3 + 6q

⇒ 56 - 3 ≤ 6q

⇒ 53 ≤ 6q

⇒ 8.33 ≤ q

Hence, By options, The solution of the inequality is,

⇒ q = 11

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Answer:

See below

Step-by-step explanation:

Slope-intercept form of an equation of line:

[tex]y = mx + c[/tex]  —— eq(i)

Where:

c = y-intercept

  = y-value for which the corresponding x-value is 0

  = [tex]-1[/tex] (From the provided table)

m = slope
   = [tex]\frac{rise}{run}[/tex]

   = [tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex] —- eq(ii)

Choose any two sets of coordinates and then substitute in eq(ii). I chose:

[tex](3, 8)[/tex] as [tex](x_{1}, y_{1})[/tex]

[tex](4, 11)[/tex] as [tex](x_{2}, y_{2})[/tex]

   = [tex]\frac{11 - 8}{4 - 3}[/tex]

   = [tex]\frac{3}{1}[/tex]

∴ m = [tex]3[/tex]

Substituting the values of c and m in eq(i):

[tex]y = (3)x + (-1)[/tex]

∴ Equation for the function

[tex]y = 3x - 1[/tex]

Let's start by defining some variables:

P0 = 151000      // initial population in 2013

r = 0.05         // constant annual growth rate

t = 7            // number of years from 2013 to 2020

The exponential model for the population can be written as follows:

y = P0 * (1 + r)^t

Substituting in the values we get:

y = 151000 * (1 + 0.05)^7

y ≈ 209749

Therefore, the exponential model that represents the population of the city t years after 2013 is y = 151000 * (1 + 0.05)^t, and the estimated population in 2020 is about 209,749.

Note that the result is an estimation, and can be affected by various factors, such as migration and mortality rates, that are not accounted for in the model.

The complementary error function is a function commonly used in communications and signal processing to compute the tail probabilities of Gaussian random variables. It is defined as:

Q(x) = 1/√(2π) ∫x to ∞ e^(-t^2/2) dt

where x is a real number. Geometrically, Q(x) represents the area under the standard normal probability density function to the right of x. This means that Q(x) gives the probability that a standard normal random variable takes on a value greater than x.

The complementary error function is related to the error function, erf(x), which is defined as:

erf(x) = 2/√(π) ∫0 to x e^(-t^2) dt

In fact, Q(x) can be expressed in terms of erf(x):

Q(x) = 1/2 erfc(x/√2)

where erfc(x) is the complementary error function.

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(a) Event "X and Y": F

(b) Event "X or Y": A, B, C, D, F

(c) The complement of the event X: E, F, G

(a) Event "X and Y": F

The letter "F" satisfies both conditions: it comes before "E" (Event X) and it is found in the word "FACE" (Event Y).

(b) Event "X or Y": A, B, C, D, F

The letters A, B, C, D, and F satisfy either condition: they come before "E" (Event X) or they are found in the word "FACE" (Event Y).

(c) The complement of the event X: E, F, G

The complement of Event X includes all the letters that do not come before "E". In this case, the letters E, F, and G do not satisfy the condition of coming before "E".

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The probability that a randomly chosen student is taking tech given that they are taking art is 50%.

To find the probability that a randomly chosen student is taking tech given that they are taking art, we need to use conditional probability. We can use the formula:

P(Tech | Art) = P(Tech and Art) / P(Art)

We know that 62 students are taking both tech and art, so P(Tech and Art) = 62. To find P(Art), we need to subtract the number of students who are only taking tech or only taking art from the total number of students:

P(Art) = (74 - 62) + (112 - 62) + 62 = 124

Therefore, we have:

P(Tech | Art) = 62 / 124 = 0.5

So the probability that a randomly chosen student is taking tech given that they are taking art is 50%.

In summary, we can use conditional probability to find the probability that a randomly chosen student is taking tech given that they are taking art. We need to find the number of students who are taking both tech and art and the total number of students taking art, and then divide the two numbers to get the probability.

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f(-3) for the function [tex]f(x) = 4(2)^x[/tex] is equal to 1/2.

To find f(-3) for the given function.

Using the provided function, f[tex](x) = 4(2)^x:[/tex]
Identify the function:[tex]f(x) = 4(2)^x[/tex]
Replace x with[tex]-3: f(-3) = 4(2)^{ (-3)[/tex]
Simplify the exponent: [tex]2^{(-3)} = 1/(2^3) = 1/8[/tex]

Multiply by the coefficient: [tex]4 \times  (1/8) = 4/8[/tex]
Finally, simplify the fraction:
f(-3) = 4/8 = 1/2
Note: An exponent is a number that represents how many times a base number should be multiplied by itself.

It is denoted by a superscript to the right of the base number, such as in [tex]2^3,[/tex]

where 2 is the base and 3 is the exponent.

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Ellen renovates his square farmhouse foyer that has a side of 15 feet. Therefore, the area of Ellen's square farmhouse foyer is 225 square feet.

The area of Ellen's square farmhouse foyer, with a side of 15 feet, is 225 square feet.

To find the area of a square, you need to multiply the length of one side by itself.

In this case, the side of the square foyer is 15 feet, so you simply need to multiply 15 by 15.

15 x 15 = 225

Therefore, the area of Ellen's square farmhouse foyer is 225 square feet. This measurement can be useful for determining how much flooring, paint, or other materials are needed to complete the renovation project.

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A 15 ¾ in. board is cut in a single cut from a 38 ¼ in board. The saw cut takes 3/8 in.  21 ¾ inches of the 38 ¼ inch board is left.

To find out how much of the 38 ¼ inch board is left after cutting, follow these steps:
1. Determine the total length of the cut: The cut takes 3/8 inch and removes a 15 ¾ inch board, so the total length of the cut is 15 ¾ inches + 3/8 inch.
2. Convert mixed numbers to improper fractions: 15 ¾ = (15 × 4 + 3)/4 = 63/4; 38 ¼ = (38 × 4 + 1)/4 = 153/4
3. Add the improper fractions: (63/4) + (3/8) = (63/4) + (3/8 × 2/2) = (63/4) + (6/8) = (126/8) + (6/8) = 132/8 = 16 ½ inches
4. Subtract the cut length from the original board length: (153/4) - (132/8) = (153/4) - (16 ½ × 4/4) = (153/4) - (66/4) = 87/4 = 21 ¾ inches
After cutting, 21 ¾ inches of the 38 ¼ inch board is left.

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Thus, z2 in polar form is: z2 = 5√2 * (cos(-π/4) + i * sin(-π/4)).

To write z1 = 4 + 4i and z2 = 5 - 5i in polar form, we need to express them in terms of their magnitude (r) and argument (θ).

For z1 = 4 + 4i:

The magnitude (r) of z1 is given by:

|r1| = sqrt(Real^2 + Imaginary^2) = sqrt(4^2 + 4^2) = sqrt(16 + 16) = sqrt(32) = 4√2

The argument (θ) of z1 can be calculated using the arctan function:

θ1 = arctan(Imaginary / Real) = arctan(4 / 4) = arctan(1) = π/4 radians

Thus, z1 in polar form is:

z1 = 4√2 * (cos(π/4) + i * sin(π/4))

For z2 = 5 - 5i:

The magnitude (r) of z2 is given by:

|r2| = sqrt(Real^2 + Imaginary^2) = sqrt(5^2 + (-5)^2) = sqrt(25 + 25) = sqrt(50) = 5√2

The argument (θ) of z2 can be calculated using the arctan function:

θ2 = arctan(Imaginary / Real) = arctan(-5 / 5) = arctan(-1) = -π/4 radians

Thus, z2 in polar form is:

z2 = 5√2 * (cos(-π/4) + i * sin(-π/4))

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The given statement is "In determining the size of hail stones, weather spotters should report the longest dimension of the largest hail stone"

This statement is False because meteorologists ought to report the hail stones' diameter in millimeters rather than their longest dimension.

The longest dimension is the longest line member between the two points of the hailstone, while the periphery is the longest distance between the two points. The standard measurement utilized by meteorologists is the periphery, which is a more accurate measurement of the size of the hail gravestone.

This is because the hailstone size could be used as an indicator of the wind speed and the height of the storm where it formed. The National Weather Service uses size criteria to issue various hail size warnings.

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Answer:

10:23 am

Step-by-step explanation:

We Know

Ms. Brown left at 9:00 am

Her plane landed 1 hour and 23 minutes later.

What time does her plane land?

We Take

9:00 + 1:23 = 10:23 am

So, her plane landed at 10:23 am

To find vectors w1 and w2 so that s will be the transition matrix from [w1, w2] to [v1, v2], you need to follow these steps:

1. First, arrange the given vectors v1 and v2 in matrix form, let's call this matrix V:
  V = |v1 v2|

2. Next, arrange the unknown vectors w1 and w2 in matrix form, let's call this matrix W:
  W = |w1 w2|

3. Your goal is to find the transition matrix S, which when multiplied with matrix W will give you matrix V:
  S * W = V

4. To find the transition matrix S, you need to multiply both sides of the equation with the inverse of matrix W:
  S = V * W⁻¹

5. Now, calculate the inverse of matrix W (W⁻¹), and multiply it with matrix V to obtain the transition matrix S.

Keep in mind that we cannot provide specific numerical values for w1 and w2 without knowing the values of v1 and v2. However, by following these steps, you can find the vectors w1 and w2 that correspond to the given transition matrix S from [w1, w2] to [v1, v2].  

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Answer:Usually you should just use these two rules:

T(x)+T(y) = T(x+y)

cT(x) = T(cx)

Where T is your transformation (in this case, the scaling matrix), x and y are two abstract column vectors, and c is a constant.

If these two rules work, then you have a linear transformation :)

Step-by-step explanation:

The equation of the tangent to the curve x = 5 sin(t), y = t^2 + t at the point (0,0) is y = 5x.

To find the equation of the tangent line, we need to find the derivative of y with respect to x. Using the chain rule, we get:

dy/dx = dy/dt * dt/dx

To find dt/dx, we can take the reciprocal of dx/dt, which is:

dt/dx = 1/(dx/dt)

dx/dt = 5 cos(t), so:

dt/dx = 1/(5 cos(t))

Now, to find dy/dt, we take the derivative of y with respect to t:

dy/dt = 2t + 1

So, putting it all together, we get:

dy/dx = dy/dt * dt/dx = (2t + 1)/(5 cos(t))

At the point (0,0), t = 0, so:

dy/dx = 1/5

So the equation of the tangent line is:

y = (1/5)x + b

To find the value of b, we plug in the coordinates of the point (0,0):

0 = (1/5)(0) + b

b = 0

Therefore, the equation of the tangent line is: y = (1/5)x

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The probability of drawing a black ball from the box is 5/12, while the probability of drawing either a black or white ball is 9/12.

To find the probability of an event, we divide the number of favorable outcomes by the total number of possible outcomes.

1. Probability of drawing a black ball: There are 5 black balls in the box, and a total of 12 balls. Therefore, the probability of drawing a black ball is 5/12.

2. Probability of drawing a black or white ball: There are 5 black balls and 4 white balls in the box, totaling 9 balls. The total number of balls in the box is still 12. Hence, the probability of drawing either a black or white ball is 9/12.

For the second question regarding the baseball player's batting average, we can use the given information to determine the probability of the player getting a hit in the next at-bat.

The batting average of .300 means that the player gets 3 hits in 10 times at bat. To find the probability of getting a hit in the next at-bat, we divide the number of hits by the total number of at-bats. In this case, the probability of getting a hit is 3/10 or 0.3. Therefore, the probability that the player will get a hit in the next at-bat is 0.3 or 30%.

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The travel time for a college student travelling between her home and her college is uniformly distributed between 40 and 70 minutes. The probability that the college student will finish her trip in 60 minutes or less is c. 0.6667.

To calculate the probability, we'll use the information about the travel time uniformly distributed between 40 and 70 minutes.
Step 1: Identify the range of possible travel times.
The range is from 40 to 70 minutes, so the total range is 70 - 40 = 30 minutes.
Step 2: Identify the desired range (60 minutes or less).
Since we want to find the probability that the trip takes 60 minutes or less, the desired range is 60 - 40 = 20 minutes.
Step 3: Calculate the probability.
Since the distribution is uniform, the probability is simply the ratio of the desired range to the total range. Therefore, the probability is 20/30 = 2/3 = 0.6667.

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The next row of Pascal's triangle for the given row 1 7 21 35 35 21 7 1 is equal to  1 8 28 56 70 56 28 1.

Row of Pascal's triangle is equal to,

1 7 21 35 35 21 7 1

To find the next row of Pascal's triangle given the row 1 7 21 35 35 21 7 1,

Use the property that each element in Pascal's triangle is the sum of the two elements directly above it.

Let us calculate the next row,

Row  =       1 7 21 35 35 21 7 1

Next row =  1 _ _ _ _ _ _ 1

To fill in the missing values,

Start by writing down the first and last elements, which are always 1,

Row = 1 7 21 35 35 21 7 1

Next row= 1 _ _ _ _ _ _ 1

Next, we can calculate the remaining elements by adding the two elements directly above each empty space,

Row =  1 7 21 35 35 21 7 1

Next row = 1 8 _ _ _ _ 8 1

Continuing the process,

Row = 1 7 21 35 35 21 7 1

Next row = 1 8 28 _ _ 28 8 1

Row = 1 7 21 35 35 21 7 1

Next row = 1 8 28 56 _ 56 28 1

Row = 1 7 21 35 35 21 7 1

Next row = 1 8 28 56 70 56 28 1

Therefore, the next row of Pascal's triangle is 1 8 28 56 70 56 28 1.

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The zeros of the function G(t) are given by t = -1 + √(20.25g) and t = -1 - √(20.25g).

What is algebra?

Algebra is a branch of mathematics that deals with mathematical operations and symbols used to represent numbers and quantities in equations and formulas. It involves the study of variables, expressions, equations, and functions.

To find the zeros of the function G(t), we need to find the values of t that make G(t) equal to zero. So, we start by setting G(t) to zero and solving for t:

G(t) = 0

(t+1)2 - 20.25g = 0 [substituting G(t) in place of 0]

(t+1)2 = 20.25g [adding 20.25g to both sides]

t+1 = ±√(20.25g) [taking the square root of both sides]

t = -1 ± √(20.25g) [subtracting 1 from both sides]

So, the zeros of the function G(t) are given by t = -1 + √(20.25g) and t = -1 - √(20.25g).

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The answer to your question would be 1530 because the whole number is 1800 and then the 85% would be 153.

The radius of convergence of the power series 12"x" n! n=1 is infinity.To determine the radius of convergence, we use the ratio test.

Let a_n be the nth term of the series, then a_n = 12"x" n! / n. Applying the ratio test, we have:

lim as n approaches infinity of |a_{n+1}/a_n| = lim as n approaches infinity of |12"x" (n+1)! / (n+1)| / |12"x" n! / n|

= lim as n approaches infinity of |12"x"| * (n+1) / n

= |12"x"| * lim as n approaches infinity of (n+1) / n

Since lim as n approaches infinity of (n+1) / n = 1, the limit simplifies to |12"x"|. The ratio test tells us that the series is convergent when |12"x"| < 1 and divergent when |12"x"| > 1. Since |12"x"| is always positive, the series is convergent for all values of x, which means the radius of convergence is infinity.

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Angles a and 139 are corresponding angles thus a = 139°

Angles a and b are supplementary hence b = 41°

When a transversal connects two parallel lines, it creates corresponding angles, which are two angles in a pair. A transversal produces a total of eight angles when it crosses two parallel lines. Pairs of these angles that are at the same relative position at each intersection are said to be corresponding angles.

Angles that correspond to one another have the same measure and are therefore congruent. The characteristics of parallel lines and the angles that the transversal forms lead to this congruence.

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Susan most likely used angle facts related to the sum of angles in a triangle to calculate angle a and then used triangle angle-sum property to find angle b.

To answer your questions:

Susan likely used angles facts related to the sum of angles in a triangle to find the calculation of angle a. This principle states that the sum of all angles in a triangle is always equal to 180 degrees.

For angle b, she then used triangle angle-sum property, which states that the measure of an angle of a triangle is equal to the sum of the measures of the other two angles subtracted from 180 degrees.

For instance, if angle a was 41 degrees, and the third angle was known to be 100 degrees, she would subtract these two angles from 180, resulting in angle b being 39 degrees.

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A value of r greater than 0.40 indicates a stronger correlation than 0.40.

The correlation coefficient, denoted as "r," measures the strength and direction of the linear relationship between two variables. The value of r ranges from -1 to 1. When the absolute value of r is closer to 1, it indicates a stronger correlation. In this case, a value of r greater than 0.40 suggests a stronger positive correlation than 0.40.

This means that as one variable increases, the other variable tends to increase as well, and the relationship between the variables is more pronounced. For example, if the correlation coefficient is 0.60, it indicates a stronger positive correlation than 0.40. Similarly, if the correlation coefficient is 0.90, it indicates an even stronger positive correlation. On the other hand, if the correlation coefficient is negative, such as -0.60 or -0.90, it indicates a stronger negative correlation.

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Answer:

Because the cake pan holds 234 in.³ and the four round cake pans hold a total of around 226.19 in.³

Edit: I multiplied the diameter as the radius. Answer has now been corrected.

Step-by-step explanation:

To solve this, we need to figure out how much each batter can hold.

For this one, the formula is simple. we multiple everything together to get the volume.

13×9×2=234 in.³

For this one, you will have to use pi or π. A round cake pan is most likely a cylinder. Therefore, we will use the cylinder volume formula, which is:

V=πr²h

V=π(3)²(2)

V=π(9)(2)

V=18π

V is around 56.5486678 or 56.55. However, if you are using 3.14 for π, you will get something else, 56.52.

But remember that this is only one cake pan. There are 4 of them. So, we can simply multiple the number by 4. To help this be more accurate, I will go back to 18π first.

V=18π(4)

V=72π

=226.194671058

or around 226.19.

If you are using 3.14, just multiply by 3.14 instead of π. You will get a very similar result, with only a minor difference. It all depends on which one you are using.

Good luck with your homework! If this is correct, please give me brainliest :)

Answer:

Step-by-step explanation:

You want to know the volumes of a 13×9×2 inch rectangular cake pan, and of four 2-inch deep round cake pans 6 inches in diameter.

The volume of the rectangular cake pan is given by ...

  V = LWH

  V = (13 in)(9 in)(2 in) = 234 in³

The volume of four round cake pans with diameter d is given by ...

  V = 4×(π(d/2)²h) = πd²h

  V = π(6 in)²(2 in) = 72π in³ ≈ 226.2 in³

The rectangular pan holds more cake batter.

The cake pan holds 234 in³, and the four round pans hold 226.2 in³.

__

Additional comment

You often see the formula for the volume of a cylinder as ...

  V = πr²h

Since r = d/2, and the diameter is given here, we used the diameter in the formula above. We also made the formula apply to four (4) cake pans, which simplified our math.

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Function g(r) = -(I + 8)³ has a restricted domain, since the cube of any real number can be either positive or negative, but not both. Specifically, in this case, the domain of g(r) is restricted to the set of real numbers where (I + 8)³ is non-negative.

The solution to the given expression 3(1/4 - 2) + |-7| is 7/4.

The expression is given as follows:

3(1/4 - 2) + |-7|

To solve the given expression, we need to follow the order of operations, which is PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

First, we need to simplify the expression inside the parentheses:

1/4 - 2 = -7/4

Next, we can simplify the expression by multiplying 3 by -7/4:

3(-7/4) = -21/4

Finally, we need to evaluate the absolute value of -7:

|-7| = 7

Substituting the values into the original expression, we get:

3(1/4 - 2) + |-7| = -21/4 + 7

Combining like terms, we get:

3(1/4 - 2) + |-7| = -21/4 + 28/4

Simplifying, we get:

3(1/4 - 2) + |-7| = 7/4

Therefore, the solution to the expression 3(1/4 - 2) + |-7| is 7/4.

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The complete question is as follows:

Solve the below expression

3(1/4 - 2) + |-7|

Part A:

Best graphical representation to display data will be line graph.

Given,

Scores of basketball team during the first 13 games of the season

{85, 94, 101, 118, 107, 110, 114, 96, 117, 105, 121, 88, 125}.

Now,

Part B:

We can create line graph with a very simple technique.

Firstly,

On x - axis take the number of season the team has played. In our case the number is 13 so take 13 distinct points on the x - axis.

Secondly,

On y -axis take the scores of the team in each of the 13 seasons corresponding to their values at x - axis.

Then,

Plot the points on the graph for all 13 seasons .

Last step,

Join all the points in the graph with the help of ruler. This will form the required line graph of the question.

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We start by using the chain rule to find the derivative of w with respect to t: dw/dt = (∂w/∂x) (dx/dt) + (∂w/∂y) (dy/dt) + (∂w/∂t)

dw/dt = 320 when t = 1.

To find ∂w/∂x, we treat y and t as constants and differentiate w = x^2 y^2 t with respect to x:

∂w/∂x = 2xy^2 t

To find ∂w/∂y, we treat x and t as constants and differentiate w = x^2 y^2 t with respect to y

∂w/∂y = 2x^2 yt

To find ∂w/∂t, we treat x and y as constants and differentiate w = x^2 y^2 t with respect to t:

∂w/∂t = x^2 y^2

Substituting the given values x = 4t and y = 2t, we get:

∂w/∂x = 2(4t)(2t)^2 t = 32t^4

∂w/∂y = 2(4t)^2 (2t) t = 64t^4

∂w/∂t = (4t)^2 (2t)^2 = 64t^4

Using these values, we can write:

dw/dt = (∂w/∂x) (dx/dt) + (∂w/∂y) (dy/dt) + (∂w/∂t)

= (32t^4)(4) + (64t^4)(2) + (64t^4)

= 320t^4

Finally, substituting t = 1, we get:

dw/dt = 320(1)^4 = 320

Therefore, dw/dt = 320 when t = 1.

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The determinant of matrix A matrix equation when k1 = -4 and k2 = 0, we have x1 = -12/23 and x2 = 4/23.

The given system of equations can be written as a matrix equation as follows:

A * X = K

where

A = [[7, 3], [-2, -1]]

X = [x1, x2]

K = [k1, k2]

To solve for X, we can use the inverse of matrix A as follows:

X = A^-1 * K

To find the inverse of matrix A, we can use the formula:

A^-1 = (1/det(A)) * [[-1, -3], [2, 7]]

where det(A) is the determinant of matrix A.

Plugging in the values of A^-1 and K, we get:

X = (1/det(A)) * [[-1, -3], [2, 7]] * [-4, 0]

X = [-12/23, 4/23]

Therefore, when k1 = -4 and k2 = 0, we have x1 = -12/23 and x2 = 4/23.

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(a) The value of m∠1 in the intersecting chords is 31.5⁰.

(b) The value of m∠2 in the intersecting chords is 139⁰.

(c) The value of m∠3 in the intersecting chords is 41⁰.

(d) The value of m∠4 in the intersecting chords is 93⁰.

(e) The value of m∠5 in the intersecting chords is 69.5⁰.

(f) The value of m∠6 in the intersecting chords is 69.5⁰.

The value of the missing angles is calculated by applying intersecting chord theorem, which states that the angle at tangent is half of the arc angle of the two intersecting chords.

The measure of angle 1 is calculated as follows;

arc angle opposite 72.5⁰ = 2 x 72.5⁰ = 145⁰

missing arc angle = 360 - ( 145⁰ + 139)

missing arc angle = 76⁰

m∠1 = ¹/₂ ( 139 - 76) (exterior angle of intersecting secants)

m∠1 = ¹/₂ (63) = 31.5⁰

The measure of angle 5 is calculated as;

m∠5 = ¹/₂ (139⁰)

m∠5 = 69.5⁰ (interior angle of intersecting secants)

The measure of angle 2 is calculated as;

m∠2 = 2 x m∠5 (angle at center is twice angle at circumference)

m∠2 = 2 x 69.5 = 139⁰

The measure of angle 6 is calculated as;

m∠6 = ¹/₂ (139⁰)

m∠6 = 69.5⁰ (interior angle of intersecting secants)

The measure of angle 3 is calculated as follows;

m∠3 = ¹/₂ ( (360 - 139) - 139) (exterior angle of intersecting secants)

m∠3 = ¹/₂ (221 - 139)

m∠3 = 41⁰

The measure of angle 4 is calculated as follows;

θ = 180 - (72.5 + m∠6)

= 180 - (72.5 + 69.5)

= 180 - 142

= 38

Each base angle of angle 2 = ¹/₂ (180 - 139) = 20.5⁰

= 38 - 20.5⁰

= 17.5⁰

m∠4 = 180 - (17.5⁰ + m∠5) (sum of angles in a triangle)

m∠4 = 180 - (17.5 + 69.5)

m∠4 = 93⁰

Learn more about chord angles here: brainly.com/question/23732231

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