We are given that a city has a population of 136000 in 1992 and a growth rate of 1.7% per year.
Part a) An exponential function that models the exponential growth is given by:
\(P=P_0e^{rt}\)Where
\(\begin{gathered} P_0=\text{ initial population} \\ r=\text{ growth rate in decimal form} \\ t=\text{ time} \end{gathered}\)The growth rate in decimal form is the following:
\(r=\frac{1.7}{100}=0.017\)Now we substitute the values and we get:
\(P=136000e^{0.017t}\)Part b) For the year 2005 there are 13 years, therefore, we substitute in the equation the values t = 13:
\(P=136000e^{(0.017)(13)}\)Solving the operations we get:
\(P=169636\approx170000\)Therefore, the population in 2005 is approximately 170000.
27-[38-{46-(15-13-2)}]
Answer:
27-[38-{46-(15-13-2)}]
27-(38-(46-0)
2-(38-46)
27-(-8)
27+8
35
Is this better
(I'll be giving brainliest and extra points to who ever helps me!!)
Solve one and three fourths times two fourths.
A) fourteen sixteenths
B) fifteen sixteenths
C) seventeen sixteenths
D) eighteen sixteenths
Answer:
A. fourteen sixteenths
Step-by-step explanation:
\(1\frac{3}{4} x \frac{2}{4}\)
\(\frac{7}{4} x \frac{2}{4}\)
\(\frac{14}{16}\)
Hope I helped you out!
~PumpkinSpice1
♥☼☺
Answer:
A it didnt let me answer at first and it dose now
Step-by-step explanation:
In this triangle, the product of sin B and tan C is
90°
and the product of sin C and tan B is
In this triangle, the product of sin B and tan C is\(b^2/(ac)\) , and the product of sin C and tan B is \(c^2/(ab)\).
In a right-angled triangle ABC, where angle A is 90 degrees, we have the following side lengths:
AB = c (base)
BC = a (hypotenuse)
AC = b (perpendicular)
We need to calculate the products of sin B and tan C, and sin C and tan B.
First, let's calculate sin B and tan C:
sin(B) = opposite/hypotenuse = AC/BC = b/a
tan(C) = opposite/adjacent = AC/AB = b/c
The product of sin B and tan C is sin(B) * tan(C) = (b/a) * (b/c) = \(b^2\)/(ac).
Next, let's calculate sin C and tan B:
sin(C) = opposite/hypotenuse = AB/BC = c/a
tan(B) = opposite/adjacent = AB/AC = c/b
The product of sin C and tan B is sin(C) * tan(B) = (c/a) * (c/b) = \(c^2\)/(ab).
Therefore, in the given right-angled triangle ABC, the product of sin B and tan C is\(b^2\)/(ac), and the product of sin C and tan B is \(c^2\)/(ab).
These formulas hold true for any right-angled triangle, where the base is AB, the hypotenuse is BC, and the perpendicular is AC.
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The question probable may be:
In this triangle, the product of sin B and tan C is _____ , and the product of sin C and tan B is _______.
PLEASE HELP! Two complementary angles measure (12x - 18) and (5x +23). What is the measure of the smaller angle? (1) 5 (2) 42 (3) 48 (4) 90
Answer:
5
Step-by-step explanation:
firstly, what are complementry angles.complementary angles are angles that su
m up to 90°
(12x-18)+(5x+23)=90
collecting like terms
12x+5x+23-18=90
17x-5-90=0
17x-95=0
17x=95
divide through by 17
x=5
The measure of the smaller angle when complementary angles are given is 42 degree.
Complementary AnglesWhat are complementary angles?Complementary angles are two angles whose total is 90 degrees in geometry. In other terms, complimentary angles are two angles whose sum is 90 degrees. 60° and 30°, for instance.
Calculation for the value of x in the given angles:The first angle of the triangle is (12x - 18).
The measure of the second angle of the triangle is (5x + 23).
As both angles are complementary, their sum would be equal to 90 degree.
(12x - 18) + (5x + 23) = 90
12x - 18 + 5x + 23 = 90
17x = 85
x = 5
Calculation for the angles.Substitute the value of x = 5 in the given angles.
(1) 12x - 18 = 12×5 - 18
= 42 degrees
(2) 5x + 23 = 5×5 +23
= 48 degrees
Therefore, the smaller angle is found to be 42 degrees.
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Write the word sentence as an equation. Then solve the equation.
46 is the total of 18 and a number $d$ .
An equation that represents this word sentence is
.
The solution is $d=$
.
Answer:uhhhh
Step-by-step explanation:
So yeah
HELP!!! find the value of x
Answer:
don't know
.....................
Answer:
x = 12
Step-by-step explanation:
Consider three orthogonal triangles (see picture)
1. The smallest triangle
2. The medium triangle
3. The big triangle that holds both triangles.
All are orthogonal (or right triangles) so you can use Pythagoras Theorem:
"The area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides"
Use Pythagoras theorem on triangle 1.
\(a^{2} = 3^{2} + 6^{2} = 45\)
Now user Pythagoras on triangle 2.
\(b^{2} = x^{2} + 6^{2} = x^{2} + 36\)
Now use Pythagoras on triangle 3 (the big triangle).
\((3 + x )^{2} = a^{2} + b^{2}\\x^{2} + 6x + 9 = a^{2} + b^{2}\)
Now replace the values for \(a^{2}\) and \(b^{2}\) from the two equations derived from triangle 1 and 2:
\(x^{2} + 6x + 9 = 45 + x^{2} + 36\)
The two \(x^{2}\) get cancelled out, so:
\(6x + 9 = 45 + 36\\x = 12\)
TA DA!
The paper people shipped a total of 2,088 notepads in boxes. if each box contained 72 notepads, how many boxes did they ship
f(t)= 102,000/1+4400e^-t
Answer:
Beginning (t=0) population with flu is 23.
After 4 weeks, population with flu is 1250.
After an infinite amount of weeks, the population witf flu is 102000
Step-by-step explanation:
First question asks you to replace t with 0 because it says beginning.
102000/(1+4400e^-0)=102000/(1+4400)=102000/4401=23.17655 approximately. To nearest whole number this is 23.
After 4 weeks means we replace t with 4:
102000/(1+4400e^-4)
Calculator time:
1250.17142 which to nearest whole number is 1250
If t is super large, then e^-t is super close to 0.
So the limiting number is
102000/(1+4400×0)=102000/1=102000
The set of natural numbers x that satisfy x + 4 = 3
Answer:
{ } [Empty set]
Step-by-step explanation:
x + 4 = 3
=> x = 3 - 4
=> x = -1
but -1 is not natural and only one solution for this equation.
Therefore, no set of natural numbers.
Find the original slope of (-6,-1) and (0,3)
Answer:
slope (m) = 2/3
Step-by-step explanation:
slope = change in x /change in y
Also, slope is y2 - y1 / x2 -x1. That is what I apply for this activity, hence:
slope = 3 - (-1) / 0 - (-6)
= 3 + 1 / 0 + 6
= 4 / 6
= 2/3
∴ slope(m) = 2/3
If someone could help me with this it would be greatly appreciated as I've been stuck on this for a while and decided I could use a hand. Explain, using words and numbered steps (1, 2, ...), how you would graph, by hand, the relation y = 2x + 1. You may find it useful to actually graph the relation by hand and then use this to help develop your numbered steps
Answer:
Step-by-step explanation:
1. Begin by graphing the y-intercept of +1. The y-intercept exists where x = 0; therefore, the coordinate of the y-intercept is (0, 1). Plot this point.
2. From the y-intercept, incorporate the slope by going up or down then right or left. The slope is 2, which can be written as +2/+1; this means from the y-intercept you will move up 2 units and then over to the right 1 unit and make another point.
3. Connect the 2 points to make your line.
1.055.
Determine whether the statement is true or false. If the statement is false, give a reason.
{5, 6, 7} = {5, 5, 6, 7, 7}
Given:
The statement is:
{5, 6, 7} = {5, 5, 6, 7, 7}
To find:
Whether the given statement is true or false.
Solution:
Two sets are equal if they have exactly the same elements.
The given set {5, 6, 7} has three elements and the set {5, 5, 6, 7, 7} has five elements but we known that all the elements of a set are distinct. It means, it has no repeated element.
Set {5, 5, 6, 7, 7} has three distinct elements 5, 6, 7. So,
{5, 5, 6, 7, 7} = {5, 6, 7}
Therefore, the given statement is true.
What is the value of x in the equation 4(7x + 3) = 19? (5 points)
What is the solution (q, r) to this system of linear equations?
12q + 3r = 15
–4q – 4r = –44
(–18, 29)
(–2, 13)
(8, –1)
(15, –44)
Answer:
Step-by-step explanation:
12q + 3r = 15
-12q - 12r = -132
-9r = -117
r = 13
12q + 3(13) = 15
12q + 39 = 15
12q = -24
q = -2
(-2, 13)
b is the answer
Answer:
(-2,13)
Step-by-step explanation:
i took the test and can confirm its 100% on edge
If an increase in the price of blue jeans leads to an increase in the demand for tennis shoes, then blue jeans and tennis shoes are
a. substitutes.
b. complements.
c. normal goods.
d. inferior goods.
e none of the above
If an increase in the price of blue jeans leads to an increase in the demand for tennis shoes, then blue jeans and tennis shoes are substitutes.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
The statement "If an increase in the price of blue jeans leads to an increase in the demand for tennis shoes"
Substitutes are two goods that can be used in place of each other for a similar purpose.
In this case, if the price of blue jeans increases, consumers may switch to buying more tennis shoes instead, since they serve a similar purpose in terms of clothing.
Complements are two goods that are used together, such as peanut butter and jelly.
Normal goods are goods whose demand increases as income increases, while inferior goods are goods whose demand decreases as income increases.
Hence, If an increase in the price of blue jeans leads to an increase in the demand for tennis shoes, then blue jeans and tennis shoes are substitutes.
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State the null and the alternative hypothesis for the above scenario
We were given:
X = 61% = 0.61
P = 65% = 0.65 =μ
n = 900
α = 0.05
let us first get the value of Z
Recall,
\(z=\frac{x-\mu}{\sqrt[]{\frac{P(1-P)}{n}}}\)On substitution
\(\begin{gathered} z=\frac{0.61-0.65}{\sqrt{\frac{0.64-(1-0.64)}{900}}} \\ \\ z=-2.5 \end{gathered}\)z = -2.5
Let us get the probability at z = -2.5
From the table:
P = 0.0062
Since the probability calculated is bigger than ).05 the given probability, then the company's claim is not true
Also,
Null Hypothesis states that:
\(H_o:P\ge0.64\)While,
Alternative Hypothesis states thus:
\(H_o:P<0.64\)Pearl writes down seven consecutive integers, and adds them up. The sum of the integers is equal to $\frac{21}{4}$ times the largest of the seven integers. What is the smallest integer that Pearl wrote down?
The smallest integer that Pearl wrote down is -12.Let's assume the smallest integer that Pearl wrote down is represented by the variable "x."
According to the given information, the sum of the seven consecutive integers is equal to $\frac{21}{4}$ times the largest integer.
The sum of consecutive integers can be expressed as the sum of an arithmetic series. The sum of an arithmetic series can be calculated using the formula:
Sum = (n/2)(first term + last term)
In this case, the first term is x and the last term is x + 6 (since there are seven consecutive integers). Therefore, the sum of the integers can be written as:
Sum = (7/2)(x + (x + 6))
Simplifying the equation:
(7/2)(2x + 6) = (21/4)(x + 6)
Multiplying both sides by 4 to eliminate the fractions:
14x + 42 = 21x + 126
Subtracting 14x from both sides:
42 = 7x + 126
Subtracting 126 from both sides:
-84 = 7x
Dividing both sides by 7:
-12 = x.
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Find the value of x and y variable in the following parallelogram
Answer:
y + 5 = 3y - 1
2y = 6, so y = 3
4x - 2 = x + 10
3x = 12, so x = 4
Practic
PER
2. A recipe calls for 2 cups of flour and cup of baking soda. If you are
going to adjust the recipe to include 1 cup of baking soda, how much flour
will you need?
Answer:
2cups of flour
Step-by-step explanation:
because a cup of baking soda is the same as 1 cup of baking soda
Which expression is equivalent to 1/4 (5x + 6)?
The expression which is equivalent to 1/4 (5x + 6) is; Choice A: {5(1/4)x} + {6(1/4)x}.
According to the question:
We are required to determine an expression which is equivalent to 1/4 (5x + 6).In a bid to expand the expression; we must multiply each term in the parenthesis by (1/4);
In essence; we have;
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Determine the probability of rolling a die and getting a 2
then a 5.
The probability of rolling a die and getting a 2, then a 5, is 1/36.
To determine the probability of rolling a die and getting a 2, then a 5, we need to multiply the probabilities of each event happening.
First, let's consider the probability of rolling a die and getting a 2. Since there are six equally likely outcomes when rolling a fair six-sided die (numbers 1 to 6), the probability of rolling a 2 is 1/6.
Now, let's consider the probability of rolling a die and getting a 5. Again, there are six equally likely outcomes, so the probability of rolling a 5 is also 1/6.
To find the probability of both events happening, we multiply the probabilities:
Probability of rolling a 2 and then a 5 = (1/6) * (1/6) = 1/36.
Therefore, the probability of rolling a die and getting a 2, then a 5, is 1/36.
It's important to note that each roll of the die is an independent event, meaning that the outcome of one roll does not affect the outcome of the next roll. Therefore, the probability of rolling a 2 and then a 5 remains constant at 1/36 regardless of previous rolls or the order in which they occur.
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For two n by n square matricies A and B,
suppose rankA = rankB = n-1.
Can rank(AB) become less than n-1 ?
(e.g. rank (AB) = n-2)
If so, I humbly ask you for an example.
Thank you very much.
No, the rank of the product of two n by n square matrices A and B, denoted as AB, cannot be less than n-1 if both A and B have ranks of n-1.
According to the Rank-Nullity theorem, for any matrix M, the sum of its rank and nullity is equal to the number of columns in M. In this case, the number of columns in AB is n, so the sum of the rank and nullity of AB must be n.
If rank(A) = rank(B) = n-1, it means that both A and B have nullity 1. The nullity of a matrix is the dimension of its null space, which consists of all vectors that get mapped to the zero vector when multiplied by the matrix. Since both A and B have rank n-1, their null spaces consist only of the zero vector.
Now, considering AB, if the rank of AB were less than n-1, it would mean that the nullity of AB is greater than 1.
However, this would violate the Rank-Nullity theorem since the sum of the rank and nullity of AB must be n, which is the number of columns.
Therefore, if rank(A) = rank(B) = n-1, the rank of AB cannot be less than n-1.
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Using exponential maths what is 2x = 1/128
PLEASE HELP answer 6 and 7 best explanation gets brainliest
Answer:
Imma write it in the explanation
Step-by-step explanation:
6. interior angles, alternate angles
for c to be parallel with d, we need 2 and 7 to be interior angles (a+b=180°, u/c shaped), and 3 and 5 to be alternate angles (a=b, z shaped).
7. 1+3=180°, 2+4=180°
there were 2 parallel lines in a trapezium, so for the c shape on 1 and 3 they add up to 180°, and same thing to 2 and 4.
Can someone help me?
Answer:
m∠R = 112°
m∠S = 112°
m∠T = 68°
Step-by-step explanation:
Quadrilateral QRST is a cyclic quadrilateral.
A cyclic quadrilateral is a quadrilateral drawn inside a circle where every vertex touches the circumference of the circle.
The opposite angles in a cyclic quadrilateral sum to 180°.
⇒ m∠Q + m∠S = 180°
⇒ m∠R + m∠T = 180°
Given:
m∠Q = 68°m∠R = (3x + 40)°m∠T = (5x - 52)°Measure of angle Q
⇒ m∠Q + m∠S = 180°
⇒ 68° + m∠S = 180°
⇒ m∠S = 180° - 68°
⇒ m∠S = 112°
Measure of angles R and T
⇒ m∠R + m∠T = 180°
⇒ (3x + 40)° + (5x - 52)° = 180°
⇒ )8x -12)° = 180°
⇒ 8x° = 192°
⇒ x = 24
Substituting the found value of x into the expressions for angles R and T:
⇒ m∠R = (3(24) + 40)°
⇒ m∠R = 112°
⇒ m∠T = (5x - 52)°
⇒ m∠T = 68°
Installation of a certain hardware takes a random amount of time with a standard deviation of 7 minutes. A computer technician installs this hardware on 50 different computers. These times are given in the accompanying dataset. Compute a 95% confidence interval for the mean installation time. Round your answers to two decimal places and use ascending order. 21 37 36 34 46 38 30 30 37 46 54 47 34 25 60 46 50 56 24 59 31 51 52 34 59 37913856248111505 24534545545333463
The mean installation time is either (40.78 or 44.66)
What is mean?Mean is an essential mathematical and statistical concept. The mean is the average or most frequent value among a set of numbers.
It is a measure of the central tendency of a probability distribution based on the median and the mode. It is also known as the expected value.
It is a statistical concept with significant importance in finance. The concept is utilized in a variety of financial fields, such as portfolio management and business valuation.
Calculation: From data \(mean = \frac{summation(x)}{n}\) = \(42.72\) from the all data given.95% confidence interval for u{\({\alpha =0.005, Z_{0.025} =1.96}\)} and mean±\(Z\alpha _{12} \frac{sigma}{\sqrt{n} }\) =\(42.72\)±\(1.96.\frac{7}{\sqrt{50} }\)Therefore the mean installation times are either 40.78 or 44.66.
The mean installation time is either (40.78 or 44.66)
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Answer: (40.76,44.64)
Step-by-step explanation:
Correct answers:
$\left(40.76,\ 44.64\right)$
A 95% confidence interval for μ is (x¯−zα/2σn−−√,x¯+zα/2σn−−√). Here, α=0.05, σ=7, and n=50. Use Excel to calculate the 95% confidence interval.
1. Open Excel, enter the given data in column A, and find the sample mean, x¯, using the AVERAGE function. Thus, the sample mean is x¯=42.7.
2. Click on any empty cell, enter =CONFIDENCE.NORM(0.05,7,50), and press ENTER.
3. The margin of error, rounded to two decimal places, is zα/2σn−−√≈1.94. The confidence interval for the population mean has a lower limit of 42.7−1.94=40.76 and an upper limit of 42.7+1.94=44.64.
Thus, the 95% confidence interval for μ is (40.76,44.64).
The inequality log8(2x) < log2(x – 2) can be graphed on the graphing calculator by using the inequalities log8(2x) < y and y < log2(x – 2). What is the solution set of the inequality? (0, 4) (–∞, 4) (4, ∞) (–∞, 0]
Answer:
c - (4, ∞)
Step-by-step explanation:
answer on edg
Answer:
Answer is choice C . (4, ∞)
Step-by-step explanation:
on edge
Q5. Convert 7000 yards into kilometres. Given that 1km = 1093.6 yards
1)6km
2)O 62km
3)7.3km
4)O 6.4km
Answer:
4. 6.4km
Step-by-step explanation:
I hope this helps ^-^
Please help quick I need it
The area of the composite figure is 122.24 units².
How to find the area of a composite figure?The composite figure consist of a rectangle and two semi circles. Therefore, the area of the composite figure is the sum of the area of the individua shapes.
Hence,
area of the composite figure = area of the rectangle + 2(area of semi circle)
Therefore,
area of the composite figure = 9 × 8 + 2(1 / 2 πr²)
area of the composite figure = 72 + πr²
where
r = 8 / 2 = 4 units
Therefore,
area of the composite figure = 72 + 3.14 × 4²
area of the composite figure = 72 + 3.14 × 16
area of the composite figure = 72 + 50.24
area of the composite figure = 122.24 units²
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How many solutions does each system have?
System I:
x=y-3
2x - 2y = -6
System II:
5x + 2y = -7
15x + 6y = 21
Answers
O Both systems have no solution.
O System I has no solution and System II has an infinite number of solutions.
O System I has an infinite number of solutions and System II has no solution.
O Both systems have an infinite number of solutions.
Answer:
System 1 has an infinite number of solutions and System 11 has no solution.
Step-by-step explanation:
System 1:
x = y - 3
x - y = -3
2x - 2y = -6
Divide above by 2:
x - y = -3
So the 2 equations are identical
and they have an infinite number of solutions.
System 11:
5x + 2y = -7
15x + 6y = 21
Divide the above by 3:
5x + 2y = 7
Comparing this to the first equation the left sides are the same but right sides are different ( -7 and 7)/
There is no solution to this system.