what is the return on investment if you buy 250 shares of stock for $5000 and sell it one year later for $5500? what is the return in dollar value? what is the percentage return?

The best prediction possible for the number of times you will pick a green marble is 20.

Given that,

Total number of marbles = 8

Number of green marbles = 5

Number of orange marbles = 3

When you select a random marble,

Probability of finding the green marble = 5/8

If you repeat this 32 times,

Number of times green marble will found = 32 × 5/8

                                                                     = 20

Hence the number of times green marble will be picked is 20 times.

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Since the output of the sigmoid function is 0.64, the predicted probability of the observation being malignant is 0.64. We need to set a threshold probability to classify the observation as malignant or benign.

If we set the threshold probability at 0.5, the observation would be classified as malignant, since the predicted probability (0.64) is greater than the threshold probability. However, the choice of threshold probability depends on the specific problem and the costs associated with false positives and false negatives. So, the predicted category would be malignant if the threshold probability is set at 0.5.

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(G) (-9, 12) is the point on the given line.

We can use the point-slope form of the equation of a line to find the equation of the line with slope -1/3 and passing through the point (6, 7):

y - y' = m(x - x'), where m is the slope, and (x', y') is the given point.

Plugging in m = -1/3, x' = 6, and y' = 7, we get:

y - 7 = (-1/3)(x - 6)

Multiplying both sides by -3, we get:

-3y + 21 = x - 6

x + 3y = 27

This is the equation of the line.

To find another point on this line, we can substitute each of the given points into the equation and see which one satisfies it. We can also check the answer choices one by one. Let's start with (F) (-3, 8):

x + 3y = 27

-3 + 3(8) = 21, so this point does not satisfy the equation and is not on the line.

Next, let's try (G) (-9, 12):

x + 3y = 27

-9 + 3(12) = 27, so this point does satisfy the equation and is on the line.

We can stop here and conclude that the answer is (G) (-9, 12). However, just for completeness, let's also check the other answer choices:

(H) (12, 13):

x + 3y = 27

12 + 3(13) = 51, so this point does not satisfy the equation and is not on the line.

(J) (18, -3):

x + 3y = 27

18 + 3(-3) = 9, so this point does not satisfy the equation and is not on the line.

Therefore, the answer is (G) (-9, 12).

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To change the subject you need to isolate the variable, for example the first two equations solved for t are:

Let's look at the first equations:

at² = b

We can change the subject to t. To do so, we just need to isolate the variable t in one of the sides.

if we divide both sides by a we will get:

t² = b/a

Now apply the square root in both sides:

t = √b/a

For the second equation:

t² + m = n

Now subtract m in both sides:

t² = n - m

Now again, apply the square root in both sides:

t = √(n - m)

And so on, that is how you can change the subject.

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Once a model of reality is constructed around certain assumptions, it can be tested to determine its value in predicting outcomes.

Once a model of reality is constructed around certain assumptions, it can be tested to determine its value in predicting outcomes. This involves comparing the model's predictions with actual observed data or outcomes to assess its accuracy and reliability. By testing the model against real-world data, we can evaluate its validity and determine if it accurately represents the underlying reality or phenomenon being studied.

Producing data and graphing equations are related activities that can be part of the process of testing a model, but they are not the primary purpose of the model itself. Producing data involves collecting and generating empirical data that can be used to assess the model's predictions or outcomes. Graphing equations can be a way to visualize the relationships between variables in the model, but it is not the main purpose of the model itself. The primary purpose of constructing a model is to make predictions or generate hypotheses about how a system or phenomenon works, and testing these predictions against real-world outcomes is the key step in evaluating the model's value.

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The horizontal distance along the grid line from the highest grid elevation point to the 97 contour is 52.38 feet.

To solve this problem, we first need to determine the location of the highest grid elevation point on the grid line labeled 96.33 and 97.48.

Let's assume that the highest grid elevation point is located at a distance of x feet from the grid line labeled 96.33. Therefore, the distance from the same point to the grid line labeled 97.48 would be 50 - x feet (as the total length of the grid line is 50 feet).

Now, we need to determine the location of the 97 contour on the same grid line. Let's assume that the 97 contour intersects the grid line at a distance of y feet from the grid line labeled 96.33.

Since the highest grid elevation point is on the same grid line, it must also be on the 97 contour. Therefore, we can set the elevation at the highest point equal to 97 and use this information to solve for x and y.

We can set up two equations based on the information we have:

x² + y² = d² (Equation 1)

x + (50 - x) = y (Equation 2)

where d is the horizontal distance we are trying to find.

We can simplify Equation 2 to:

50 = y

Substituting this into Equation 1, we get:

x² + 50² = d²

Rearranging this equation, we get:

d² = x² + 2500

Now we can substitute 97 for the elevation at the highest point, and solve for x:

(97 - 96.33)/0.01 = x/50

x = 33.5 feet

Substituting this value of x into the equation for d², we get:

d² = (33.5)² + 2500 = 2742.25

Taking the square root of both sides, we get:

d = 52.38 feet (approx.)

Therefore, the horizontal distance along the grid line from the highest grid elevation point to the 97 contour is approximately 52.38 feet.

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Answer:

4c² - 17c + 32

Step-by-step explanation:

To expand (c -2)², use the identity (a - b)² = a² - 2ab + b²

(c - 2)² = c² - 2*c*2 + 2²

            = c² - 4c + 4

Use FOIL method to find (3c + 1)(c -4)

(3c  + 1)(c - 4) = 3c*c  - 3c *4 + 1*c - 1*4

                     = 3c² - 12c + 1c - 4

                      = 3c² - 11c  - 4  {Combine like terms}

7(c - 2)² - (3c + 1)(c -4) = 7*(c²- 4c + 4) - (3c² - 11c - 4)

Multiply each term of c² - 4c + 4 by 7 and each term of 3c² - 11c - 4 by (-1)

                                    = 7c² - 7* 4c + 7*4  - 3c² + 11c + 4

                                     = 7c² - 28c + 28 - 3c² + 11c + 4

                                     = 7c² - 3c² - 28c + 11c + 28 + 4

 Combine like terms,

                                     = 4c² - 17c + 32

In the marketing class of 50 students who evaluated their instructor using the given scale, the descriptive summary of the survey results indicated that the majority of students rated the instructor as either average or poor, with 45% in each category.

This suggests that the instructor's performance might not have been highly effective or satisfactory for most of the students. Meanwhile, a small percentage of students found the instructor to be good (8%) and even fewer rated them as superior (2%). No students rated the instructor as inferior.

Based on these findings, the conclusion can be drawn that the instructor's performance was perceived as predominantly average or poor by the class, indicating potential areas for improvement in their teaching approach or methods to better cater to students' needs and expectations.

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(a) Without more information, we cannot determine the initial number of insects. (b) The differential equation satisfied by P(t) is: dP/dt = kP, where k is the growth rate of the insect population.

(c) To find the time it takes for the population to double, we can use the formula:

2P(0) = P(0)e^(kt)

where P(0) is the initial population size. Solving for t, we get:

t = ln(2)/k

(d) Without more information, we cannot determine the time at which the population will equal a certain value.
Hi! To answer your question, I need the specific function P(t). However, I can provide you with a general framework to answer each part of your question once you have the function.

(a) To find the initial number of insects, evaluate P(t) at t=0:
P(0) = [Insert the function with t=0]

(b) To find the differential equation satisfied by P(t), differentiate P(t) with respect to t:
dP(t)/dt = [Insert the derivative of the function]

(c) To find the time at which the population doubles, first determine the initial population, P(0), then solve for t when P(t) is twice that value:
2*P(0) = P(t)
Solve for t: [Insert the solution for t]

(d) To find the time at which the population equals a specific value (let's call it N), set P(t) equal to N and solve for t:
N = P(t)
Solve for t: [Insert the solution for t]

Once you have the specific function P(t), you can follow these steps to find the answers to each part of your question.

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Answer:

A

Step-by-step explanation:

the answer is A. because the direction of arow is left. and at point 8, the point is hollow.

Answer:

Height of Bigfoot 5 = Height of Bigfoot 2 + 4.9

Substituting the expressions we derived earlier, we get:

(x + 4.9) = x + 4.9

Simplifying the equation, we see that x cancels out on both sides, leaving us with:

4.9 = 4.9

This equation is true for any value of x, which means that we cannot determine the height of Bigfoot 2 from this information alone.

Therefore, we need additional information or data to solve for the value of x and determine the height of Bigfoot 2.

The probability that a randomly selected dinner bill will be at least $39.10 is approximately 0.0322.

a. The random variable in this case is the amount of money spent on dinner bills in the local restaurant on a daily basis.

b. To find the probability that a randomly selected bill will be at least $39.10 To do this, we can use the formula  z = (x - μ) / σ

Where

Substituting the values, we get:

z = (39.10 - 28) / 6

z = 1.85

We need to find the probability of getting a z-score of 1.85

The probability can be determined by using a conventional normal distribution table and is as follows:

P(z > 1.85) = 1 - P(z < 1.85) = 1 - 0.9678 = 0.0322

Therefore, the probability that a randomly selected dinner bill will be at least $39.10 is approximately 0.0322.

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The probability that a four-digit palindrome is a multiple of 99 can be found by dividing the number of four-digit palindromes that are multiples of 99 by the total number of four-digit palindromes. A four-digit palindrome has the form ABBA, where A and B are digits from 1 to 9. A multiple of 99 has the form 99x, where x is an integer from 1 to 99. The number of four-digit palindromes that are multiples of 99 is 9 (since A cannot be 0) and the total number of four-digit palindromes is 90 (since there are 9 choices for A and B). Therefore, the probability is 9/90 or 1/10.

To solve this problem, we need to understand what a four-digit palindrome and a multiple of 99 are. A four-digit palindrome is a number that reads the same backward as forward, such as 1221 or 7337. A multiple of 99 is a number that can be written in the form 99x, where x is an integer. For example, 99, 198, and 297 are multiples of 99.

To find the probability that a four-digit palindrome is a multiple of 99, we first need to determine how many four-digit palindromes there are. Since the first digit can be any number from 1 to 9 and the second digit can also be any number from 1 to 9 (since it needs to be different from the first digit), there are 9 x 9 = 81 possible choices for the first two digits. The third digit must be the same as the first digit, and the fourth digit must be the same as the second digit. Therefore, there are only 9 possible choices for the third and fourth digits.

Next, we need to determine how many of these four-digit palindromes are multiples of 99. To do this, we can list all the possible four-digit palindromes that are multiples of 99. We find that there are only 9 such numbers: 1100, 1210, 1320, 1430, 1540, 1650, 1760, 1870, and 1980. Therefore, the probability that a four-digit palindrome is a multiple of 99 is 9/90 or 1/10.

The probability that a particular four-digit palindrome is a multiple of 99 is 1/10. This can be found by dividing the number of four-digit palindromes that are multiples of 99 (9) by the total number of four-digit palindromes (90). Therefore, if we are given a four-digit palindrome, there is a 1/10 chance that it is a multiple of 99.

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The half-life of the substance is approximately 17.78 days.

The exponential decay model for the mass of the substance can be written as:

[tex]m(t) = m0 \times e^{(-rt)},[/tex]

where m0 is the initial mass, r is the decay rate parameter (as a decimal), and t is time in days.

If we want to find the half-life of the substance, we need to find the value of t when the mass has decreased to half of its original value (m0/2). In other words, we need to solve the equation:

m(t) = m0/2

[tex]m0 \times e^{(-rt)} = m0/2[/tex]

[tex]e^{(-rt) }= 1/2[/tex]

Taking the natural logarithm of both sides, we get:

-ln(2) = -rt

t = (-ln(2)) / r

Substituting the value of r (0.039), we get:

t = (-ln(2)) / 0.039

t ≈ 17.78 days

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After halving twice, the population of the bacteria colony is 5,000.

To represent the population of a bacteria colony that starts at 20,000 and halves twice, we can use an exponential decay formula. The general formula for exponential decay is P(t) = P0 * (1 - r)^t, where P(t) is the population at a certain time, P0 is the initial population, r is the decay rate, and t is the time elapsed.

In this case, the initial population P0 is 20,000, and since the population halves twice, we need to multiply the decay rate by 2. As the colony halves, the decay rate is 0.5 (50%). To represent two halving events, we can use t=2.

Thus, the expression representing the population of the bacteria colony is:

P(t) = 20000 * (1 - 0.5)^2

This expression calculates the remaining population after the bacteria colony halves twice. If you need to find the population at this point, simply solve the expression:

P(t) = 20000 * (1 - 0.5)^2
P(t) = 20000 * (0.5)^2
P(t) = 20000 * 0.25
P(t) = 5000

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The probability that Max will get the job is 3/10 or 0.3.

To see why, we can use the fact that the sum of the probabilities of all possible outcomes is equal to 1. Let A, B, and C represent the events that the first, second, and third companies respectively get the job.

Then the probability that Max gets the job is equal to the probability of event AB~C (i.e., none of the other companies gets the job).

The probability of A is 1/5, the probability of B is 1/2, and the probability of C is 3/10 (since the sum of the probabilities of all three events is 1). Using the formula for the probability of the intersection of independent events, we have:

P(AB~C) = P(~A) * P(~B) * P(~C) = (4/5) * (1/2) * (7/10) = 14/50 = 0.28

So the probability that Max gets the job is 0.3, or 3/10.

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The standard error of the mean can be calculated as the population standard deviation divided by the square root of the sample size. Therefore, in this case, the standard error of the mean would be 7 / √100 = 0.7.

To calculate the standard error of the mean, you'll need to use the population standard deviation and the sample size provided. Here's a step-by-step explanation:

1. Note the population standard deviation (σ): 7
2. Note the sample size (n): 100
3. Use the formula for standard error of the mean: SE = σ / √n
4. Plug in the values: SE = 7 / √100
5. Calculate: SE = 7 / 10
6. The standard error of the mean is: SE = 0.7

Your answer: The standard error of the mean is 0.7.

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Mo's conjecture that a pentagon cannot contain 4 right angles is correct.

A pentagon is a five-sided polygon. In order for a polygon to contain a right angle, it must have at least one interior angle measuring 90 degrees.

The sum of the interior angles of a pentagon is given by the formula (n-2) x 180 degrees, where n is the number of sides. For a pentagon, this formula gives us (5-2) x 180 = 540 degrees.

In order for a pentagon to contain four right angles, the sum of the interior angles that are right angles would have to be 4 x 90 = 360 degrees. However, this is impossible because the remaining interior angles would have to add up to 540 - 360 = 180 degrees.

Since a pentagon only has five interior angles, it is not possible for three of them to add up to 180 degrees, which means it is impossible for a pentagon to contain four right angles.

Therefore, Mo's conjecture that a pentagon cannot contain 4 right angles is correct.

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The probability that exactly 20 random numbers will fall in the interval 0.1 to 0.35 is approximately 0.0223, or 2.23%.

To solve this problem, we need to use the binomial probability formula:
[tex]P(X = k) = (n choose k)  p^k  ( (1 - p)^{n-k}[/tex]

where:
- X is the random variable representing the number of successes (random numbers in the interval 0.1 to 0.35)
- k is the number of successes we want (exactly 20)
- n is the total number of trials (100)
- p is the probability of success (the probability that a randomly generated number falls in the interval 0.1 to 0.35)

To find p, we need to determine the fraction of the interval 0 to 1 that is between 0.1 and 0.35:
[tex]p = (0.35 - 0.1) / 1 = 0.25\\p = \frac{0.35-0.1}{1} = 0.25[/tex]

Now we can plug in the values and calculate the probability:

[tex]P(X = 20) = (100 choose 20) (0.25)^{20}   (1-0.25)^{100-20}[/tex]
= 0.0223

Therefore, the probability that exactly 20 random numbers will fall in the interval 0.1 to 0.35 is approximately 0.0223, or 2.23%.

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The probability that Tamika's result is greater than Carlos' result is $\boxed{\frac{4}{9}}$.

To solve this problem, we can start by finding all the possible sums that Tamika can get by adding two different numbers from the set $\{8,9,10\}$:

- $8+9=17$
- $8+10=18$
- $9+10=19$

Similarly, we can find all the possible products that Carlos can get by multiplying two different numbers from the set $\{3,5,6\}$:

- $3\times5=15$
- $3\times6=18$
- $5\times6=30$

Now we need to compare each sum with each product to see which ones satisfy the condition that Tamika's result is greater than Carlos' result. We can organize this information in a table:

| Tamika's sum | Carlos' product | Tamika's sum > Carlos' product? |
| ------------ | -------------- | ----------------------------- |
| 17           | 15             | Yes                           |
| 17           | 18             | No                            |
| 17           | 30             | No                            |
| 18           | 15             | Yes                           |
| 18           | 18             | No                            |
| 18           | 30             | No                            |
| 19           | 15             | Yes                           |
| 19           | 18             | Yes                           |
| 19           | 30             | No                            |

Out of the 9 possible combinations, there are 4 that satisfy the condition, namely when Tamika gets a sum of 17, 18 (twice), or 19 and Carlos gets a product of 15 or 18. Therefore, the probability that Tamika's result is greater than Carlos' result is $\boxed{\frac{4}{9}}$.

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Answer:

the second option

Step-by-step explanation:

because that is supposed to be the median of the data

The calculated values of the first four terms of the sequence are -4, -2, 2 and 10

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

a1 = -4

an = 2a(n - 1) + 6

Using the above as a guide, we have the following equations

a(2) = 2a1 + 6

a3 = 2a2 + 6

a4 = 2a3 + 6

Substitute the known values in the above equation, so, we have the following representation

a2 = 2 * -4 + 6 = -2

a3 = 2 * -2 + 6 = 2

a4 = 2 * 2 + 6 = 10

Hence, the first four terms of the sequence are -4, -2, 2 and 10

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Answer:

20fish

Step-by-step explanation:

so 1/2 of 16 is 8

or 1/4 of 32 is 8

so 8+32=40

40 1/2 is 20

so 20 fish caught on Monday

The 99% confidence interval estimate for the difference between the percentages of married elderly men and women is (0.0741, 0.2659).

To determine a 99% confidence interval estimate for the difference between the percentages of elderly men and women who were married, we can use the formula for the confidence interval of two proportions:

CI = (p1 - p2) ± Z * √[(p1 * (1-p1) / n1) + (p2 * (1-p2) / n2)]

Where p1 and p2 are the proportions of married elderly men and women, n1 and n2 are the sample sizes, and Z is the Z-score for a 99% confidence level (which is 2.576).

First, convert the percentages to proportions:
p1 = 0.65 (65% married elderly men)
p2 = 0.48 (48% married elderly women)
n1 = 300 (sample size of elderly men)
n2 = 400 (sample size of elderly women)

Now, plug the values into the formula:

CI = (0.65 - 0.48) ± 2.576 * √[((0.65 * 0.35) / 300) + ((0.48 * 0.52) / 400)]
CI = 0.17 ± 2.576 * √[(0.2275 / 300) + (0.2496 / 400)]
CI = 0.17 ± 2.576 * √(0.00075833 + 0.000624)
CI = 0.17 ± 2.576 * √(0.00138233)
CI = 0.17 ± 2.576 * 0.0372
CI = 0.17 ± 0.0959

Thus, the 99% confidence interval estimate for the difference between the percentages of married elderly men and women is (0.0741, 0.2659).

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∈Answer:

x ≥ 7/2

Step-by-step explanation:

-2x + 7 ≤ 0

(-2x + 7) + (-7) ≤ -7

-2x + 7 - 7 ≤ -7

-2x ≤ -7

2x/2 ≥ 7/2

x ≥ 7/2

x ∈ [7/2,∞)

There are three F ratios in total in a 2x2 factorial design.

A 2x2 factorial design is used to evaluate the effects of two categorical independent variables on a continuous dependent variable.

In such a design, there are two independent variables, each with two levels, resulting in four treatment groups.

In a two-way ANOVA for a 2x2 factorial design, there are typically three F ratios computed:

Therefore, there are three F ratios in a two-way ANOVA for a 2x2 factorial design.

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Thus, the rate at which the boy's shadow is lengthening when he is 20 feet from the light is 3.75 feet/s.

To solve this problem, we need to use similar triangles.

Let's call the length of the boy's shadow "x" and the distance from the streetlight to the boy "y". At the moment he is 20 feet from the light, we have:

y = 20 feet (given)
x + 6 = length of the boy's shadow

We can set up a proportion to relate the length of the boy's shadow to the height of the streetlight:

(x + 6)/x = 15/6

Cross-multiplying and simplifying, we get:

6x + 90 = 15x
9x = 90
x = 10 feet

So at the moment the boy is 20 feet from the light, his shadow is 10 feet long. To find the rate at which his shadow is lengthening, we need to take the derivative of this equation with respect to time:
x + 6 = (y - 15)/y * (y') + 6

where y' is the rate at which the boy is walking away from the light (5 feet/s). Plugging in y = 20 feet and solving for x', we get:
x' = (15/20) * 5 = 3.75 feet/s

Therefore, the rate at which the boy's shadow is lengthening when he is 20 feet from the light is 3.75 feet/s.

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There are 135,135 different ways to assign grades in the graduate class under the given conditions.

We'll need to use the concept of combinations.

A combination is a selection of items from a larger set, such that the order of the items doesn't matter.

In this case, we want to find the number of ways to assign 8 A's, 5 B's, and 2 C's to a class of 15 students.
To do this, we can use the formula for combinations, which is:
C(n, r) = n! / (r! * (n-r)!)
Where C(n, r) represents the number of combinations of choosing r items from a set of n items, n! is the factorial of n (n*(n-1)*(n-2)...*1), and r! is the factorial of r.
First, assign the A's:

We have 15 students and need to choose 8 to give A's to.

Use the combination formula:
C(15, 8) = 15! / (8! * 7!) = 6435.
Now, 7 students remain, and you need to choose 5 to give B's to:
C(7, 5) = 7! / (5! * 2!) = 21
Finally, the remaining 2 students will receive C's, so there's only one way to assign C's:
C(2, 2) = 2! / (2! * 0!) = 1
Since we want the number of ways to assign all grades simultaneously, multiply the number of combinations for each grade:
Total combinations = 6435 * 21 * 1 = 135,135.

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The space would cost at, $833.34 per month.

:: Total area = 1000 square feet

:: Cost per feet per year = $10

Therefore,

Total cost per year would be, equal to the product of total area and cost per unit area per year.

That is,

Total cost per year = 1000 x $10

That is, $10,000.

Now, we know, there are 12 months in an year.

So, cost per month is, ( total cost per year / 12 )

That is, therefore,

Cost per month = ($10,000 / 12)

Which equals to, $833.34 per month. (rounded off)

So,

The space cost at, $833.34 per month.

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The space cost you $833.33. per MONTH

To calculate the monthly cost, we first need to determine the annual cost of the space.

Given that the cost is $10 per square foot per year, we know, there are 12 months in an year and the space is 1,000 square feet, the annual cost of the space would be:

Annual cost = the space  * cost

Annual cost = 1,000 square feet * $10/square foot = $10,000

To convert this to monthly cost, we divide the annual cost by 12 (the number of months in a year):

Monthly cost = $10,000 / 12 = $833.33

Therefore, the monthly cost of the 1,000 square feet of space in the new building would be $833.33.

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