Answer:
Point on the line: (0, 15)
Slope: 3
Step-by-step explanation:
Step 1: Put the equation in slope-intercept form
The slope-intercept form is written like this: y = mx + b
m = slope
b = y-intercept
1. y = 3 + 3(x + 4) → y = 3x + 15
Step 2: Retrieve the values from the equation
y-intercept = 15
slope = 3
The parabola y=x^2y=x 2 y, equals, x, squared is reflected across the xxx-axis and then scaled vertically by a factor of 555. What is the equation of the new parabola?.
By using the concept of reflection and scaling, it can be calculated that
New equation of parabola is [tex]y = -5x^2[/tex]
What is reflection and scaling?
Reflection is a mathematical transformation in which a mirror image of an object can be obtained without changing the shape and size of an object.
To draw an object of size proportional to the size of the original object, scaling is used
The equation of the parabola is [tex]y = x^2[/tex]
If it is reflected across x axis, its equation is [tex]y = -x^2[/tex]
Now y = -[tex]x^2[/tex] is scaled vertically by a factor of 5
New equation of parabola
[tex]y = -5x^2[/tex]
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If rs=12, rt=5, st=7, and points r, s, and t are collinear, what is the relationship between collinear points r, s, and t?.
Answer: The relationship between points R , S , and T is that the sum of the RS and RT will be equal to RT that is RT=RS+ST
Step-by-step explanation:
Given the algebraic expression the quantity 125 times x to the seven-thirds power end quantity to the negative one-third power comma, create an equivalent expression.
The expression that results from applying the law of indices and expression is 5x^(-7/3).
What is expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. An expression's structure is as follows: (Number/variable, Math Operator, Number/variable) is an expression. An expression, also known as a mathematical expression, is a finite combination of symbols that are well-formed in accordance with context-dependent rules.
Here,
The resulted expression will be,
(125x)^(7/3)^(-1/3)
125=5^3
(a^n)^m = a^mn
(5x)^3^7/3^-1/3
(5x)^7*-1/3
5x^(-7/3)
The resulted expression will be 5x^(-7/3) using the law of indices and expression.
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The difference of 11y from 12y is −4
translate into an equation
then solve for y
A researcher wants to test the hypothesis that on average girls perform better on standardized tests than boys. Since it is true that some boys do better than girls and some girls do better than boys, the researcher must use a two tailed test.
True OR False
The statement of the given hypothesis condition is False.
What is hypothesis testing?
A type of statistical inference known as hypothesis testing uses data from a sample to make inferences about a population parameter or population probability distribution.
Given this, A researcher wants to test the hypothesis that on average girls perform better on standardized tests than boys.
i.e. [tex]\mu_{1} > \mu_{2}[/tex]
">" sign implies that right-tailed test i.e. one-tailed right-sided.
Hence, the given statement is FALSE.
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Given the following: f(x)=x^2-8x+4;\;g(x)=4x+3;\;and\;h(x)=x+2.f(x)=x
2
−8x+4;g(x)=4x+3;andh(x)=x+2.
What is the result of the following: \left(\frac{\mathrm{h}}{\mathrm{g}}\right)(x)(
g
h
)(x)
The result of the following: [tex]\left(\frac{\mathrm{h}}{\mathrm{g}}\right)(x)[/tex] is (x+2)/( 4x+3).
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
Given the following function:
[tex]f(x)=x^2-8x+4;\;g(x)=4x+3;\;and\;h(x)=x+2.[/tex]
We need to find the result of the following: [tex]\left(\frac{\mathrm{h}}{\mathrm{g}}\right)(x)[/tex]
Therefore,
g(x)=4x+3
h(x)=x+2
[tex]\left(\frac{\mathrm{h}}{\mathrm{g}}\right)(x)[/tex] =(x+2)/( 4x+3)
Hence, the result of the following: [tex]\left(\frac{\mathrm{h}}{\mathrm{g}}\right)(x)[/tex] is (x+2)/( 4x+3).
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WILL GIVE BRAINIEST IF ANSWER ALL QUESTIONS
The value of the the function h(x) at x = 4 is given as follows:
8.7.
The quadratic regression equations for each table are given as follows:
y = -0.127x² + 4.699x - 27.777.y = 32.86x² - 379.14x + 1229.14.How to obtain the value at x = 4?The function for the first item is defined as follows:
h(x) = 50/(5.5 + 8e^(-0.9x)).
At x = 4, the value assumed by the function is obtained replacing the lone instance of x by 4, hence:
h(4) = 50/(5.5 + 8e^(-0.9(4))).
Then a calculator is used to obtain the exact value due to the exponential, hence:
h(4) = 8.7.
How to obtain the regression equations?The regression equations are obtained inserting the points of each table into a quadratic regression calculator.
For the first table, the points are given as follows:
(16, 15), (18, 15.6), (20, 15.7), (21, 15), (23, 13.1), (26, 8.9), (27, 6.6).
Hence the equation is of:
y = -0.127x² + 4.699x - 27.777.
For the second table, the points are given as follows:
(3, 330), (4, 276), (5, 263), (6, 86), (7, 174), (8, 198), (9, 553).
Hence the equation is of:
y = 32.86x² - 379.14x + 1229.14.
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for each of the following implications, state the converse, inverse, and contrapositive. a. if a quadrilateral is a parallelogram, then its opposite sides are congruent. b. if two lines do not intersect, then they are parallel. c. if the sky does not look blue, then it is not night time. d. if a rectangle is a parallelogram, then it is not a quadrilateral.
A statement in the form p→q has three related implications that are called converse, inverse, and contrapositive.
A statement in the form p→q has three related implications.
Statement: If p then q (p→q)
Converse: If q then p (q→p)
Inverse: If not p then not q (-p → -q)
Contrapositive: If not q then not p (-q → -p)
For the given implications, its converse, inverse, and contrapositive can be written as.
Given statement:
(a) If a quadrilateral is a parallelogram, then its opposite sides are congruent then its converse, inverse, and contrapositive are:
Converse: If a quadrilateral has opposite sides that are congruent then it's a parallelogram.
Inverse: If a quadrilateral is not a parallelogram then its opposite sides are not congruent.
Contrapositive: If a quadrilateral has opposite sides that are not congruent then it's not a parallelogram.
(b) If two lines do not intersect, then they are parallel:
Converse: If the two lines do not intersect in the same plane, then they are parallel.
Contrapositive: If the two lines intersect in the same plane, then they are not parallel.
(c) If the sky does not look blue, then it is not nighttime:
Converse: If it is not nighttime, then the sky looks blue.
Inverse: If the sky does not look blue then it is nighttime.
Contrapositive: If it is nighttime then the sky does not look blue.
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an srs of 28 students at uh gave an average height of 5.9 feet and a standard deviation of .1 feet. construct a 90% confidence interval for the mean height of students at uh.
The 90% confidence interval for the mean height of students at UH is (5.885,5.915) feet.
We have given that, an srs of 28 students at UH gave an average height of 5.9 feet and a standard deviation of 0.1 feet.
i.e n = 28
x = 5.9 feet
s = 0.1 feet
and we have to construct a 90% confidence interval for the mean height of students at UH.
The level of significance, α = 1 - 0.9 = 0.1
The value of 0.9 in z-table is 0.816.
The formula for confidence interval is,
CI = x ± z* (s/[tex]\sqrt{n}[/tex])
Substituting the values,
CI = 5.9 ± (0.816) (0.1/√28 )
= 5.9 ± (0.816)(0.1/5.291)
= 5.9 ± (0.816)(0.0189)
CI = 5.9 ± 0.015
CI = 5.9 + 0.015 = 5.915
CI = 5.9 - 0.015 = 5.885
Therefore 90% confidence interval for the mean height of students at UH is 5.885 feet to 5.915 feet.
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dg's plumbing and heating charges $50 plus $60 per hour for emergency service. bill remembers being billed just over $400 for an emergency call. how long to the nearest hour was the plumber at bill's house?
Answer:
6 hours
Step-by-step explanation:
dg's plumbing and heating charges $50 plus $60 per hour for emergency service. bill remembers being billed just over $400 for an emergency call. how long to the nearest hour was the plumber at bill's house?
60h + 50 > 400
subtract 50 from both sides:
60h > 350
divide both sides by 60:
h > 5.8333
rounded: 6 hours
. AB :
=
CB =
AC = 4
Answer:
Step-by-step explanation:
its 20
I need help to do this bc my math teacher can’t explain it well-
Answer:
b. 1 1/4
c. 11 3/8
d. 1 4/7
Step-by-step explanation:
b. 3 - 1 3/4
2 4/4 - 1 3/4
[4/4 - 3/4 = 1/4] and [2 - 1 = 1]
1 + 1/4
1 1/4
c. 7 3/8 + 4
Add the whole numbers.
11 3/8
d. 4 - 2 3/7
3 7/7 - 2 3/7
[7/7 - 3/7 = 4/7 and 3 - 2 = 1]
1 + 4/7
1 4/7
May I please have brainliest? Thank you!
Answer:
The goal is to make the denominators the same.
[tex]\frac{numerator}{denominator}[/tex]
Here's how to solve "b" (I explained it so you can do the other ones)
b.
[tex]3 - 1\frac{3}{4}[/tex]
Turn the 3 into a fraction (you can put any number over 1 and it will be the same)
[tex]\frac{3}{1} - 1\frac{3}{4}[/tex]
Next, let's turn the [tex]1\frac{3}{4}[/tex] into an "improper fraction". Right now, it is a mixed number. Multiply the denominator by the whole number on the left, and then add it to the numerator. The denominator will stay the same.
4 * 1 = 4
4 + 3 = 7
[tex]1\frac{3}{4}[/tex] → [tex]\frac{7}{4}[/tex]
Okay, so now we have this:
[tex]\frac{3}{1} - \frac{7}{4}[/tex]
This is getting easier! But to subtract, we have to make the denominators the same. Let's multiply the top and bottom of [tex]\frac{3}{1}[/tex] by 4.
[tex]\frac{3 * 4}{1 * 4} = \frac{12}{4}[/tex]
Now we have:
[tex]\frac{12}{4} -\frac{7}{4}[/tex]
One final step, subtract the numerators! Leave the denominators as they are.
12 - 7 = 5
Our answer is:
[tex]\frac{5}{4}[/tex]
If the area of the pentagon is 36, what is the area of the larger pentagon?
Answer:
64
Step-by-step explanation:
16 ÷ 12 = 1.33 (rounded to 2 decimal places)
1.33 = scale factor
1.33² = area scale factor
1.33² × 36 = 64 (rounded to a whole number)
Answer: 64 would be the area
Step-by-step explanation:
Two angles are
complementary. One angle is six more than
twice the other. What is the measure of each
angle?
Answer:
Step-by-step explanation:
1st angle = (2x+6)° = (56 + 6)°= 62°. 2nd angle = x = 28°. Thus, 62° and 28° are the required angles. Answer.
a number line going from 0 to 4. numbers 0, 1, 2, 3, and 4 are marked on the line. marks divide the spaces between each number into 2 equal parts. ms. cole has 4 yards of string. she cuts the string into pieces that are each 1 2 yard long. how many pieces of string does ms. cole have? one-eighth one-fourth 2 8
Ms. Cole have the 8 pieces of string.
Given,
In the question:
A number line going from 0 to 4. numbers 0, 1, 2, 3, and 4 are marked on the line. marks divide the spaces between each number into 2 equal parts. Ms. Cole has 4 yards of string. she cuts the string into pieces that are each 1 2 yard long.
To find the how many pieces of string does Ms. Cole have?
Now, According to the question:
Total yards of string = 4
Length in yard of each string = 1/2 yards
Number of pieces of string Ms. Cole has :
Total. Yards of string / length in yard of each string
=> 4 / (1/2)
=> 4 * (2 /1)
=> 8/1
=> 8 pieces of string.
Hence, Ms. Cole have the 8 pieces of string.
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what is the area of rectangular region r ? each diagonal of r has length 5. the perimeter of r is 14.
The area of rectangular region r is = 12.
Given:
each diagonal of r has length 5. the perimeter of r is 14.
Let l and b be the length and breadth of a rectangle.
we know that
perimeter of rectangle = 2 ( l + b )
2 ( l + b ) = 14
divide by 2 on both sides
( l + b ) = 14/2
l + b = 7
l = 7 - b
l^2 + b^2 = d^2
( 7 - b )^2 + b^2 = 5^2
7^2 + b^2 - 2 * 7 * b + b^2 = 25
49 + 2b^2 - 14b = 25
2b^2 - 14b + 24 = 0
on solving b = 4,3
Take any one value
b = 4
l = 7 - 4
l = 3
Area of rectangle = l * b
= 4 * 3
= 12
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The frequency table shows how many hours Ashley worked over a thirty day period. Using the frequency table, find the average number of hours Ashley worked per day. (Round to the nearest tenth.)
Responses
A 6.0
B 6.5
C 6.7
D 7.0
E 6.6
The average number of hours that Ashley worked per day is obtained as follows:
Mean = sum of relative frequencies x outcome
What is shown by the relative frequency table?The relative frequency table shows that absolute frequencies of the number of hours worked, that is, the number of days in which each amount of hours was worked.
Then the relative frequencies are obtained by the division of each of the absolute frequencies by the total number of outcomes, which is the sum of all the relative frequencies.
Finally, the mean value is obtained just like the mean of a discrete distribution, with the multiplication of each outcome by it's relative frequency obtained previously.
Missing InformationThe problem is incomplete, hence I gave a general pattern to find the mean of the data-set.
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at what speed, as a fraction of c , will a moving rod have a length 60% that of an identical rod at res
As a fraction of c, the length will be 60% at v/c = 0.76
The length of the moving rod = 60%
Using the formula for length contraction-
L = L_o(√(1 - (v²/c²))
Where;
v = The speed of the object
c = The speed of light
L = The length of the object at a moving speed
L_o = The length of the object at rest
Thus,
L = 65%
L_o = 0.65
Substituting the values -
0.65L_o = L_o[√(1 - (v²/c²))]
Dividing both sides by L_o -
0.65 = √(1 - (v²/c²))
Squaring both sides -
0.65² = (1 - (v²/c²))
v²/c² = 1 - 0.65²
v²/c² = 0.5775
Taking the square root of both sides gives;
v/c = 0.76
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Tom wants to rent a truck for two days and pay no more than $300. How far can he drive the truck if the truck rental cost $49 a day plus $0.40 a mile?
A) 490
B) 505
C) 520
D) 535
Answer:
B
Step-by-step explanation:
for 2 days it's 98
then 300-90=202
202÷0.40=505
What is the Factor of 30 and 45?
What is the Factor of 3 and 8?
Answer:
1. The GCF is 15 and the LCF is 1.
There are 4 common factors: 1, 3, 5, 15
2. The GCF and LCF is 1. This is the only common factor.
Step-by-step explanation:
To find common factors, think about what two numbers you can multiply to get the desired values. The numbers that are the same for both desired values are going to be factors.
5 years ago muskam was twice as old as sesay .if the sum of their ages is 100 find sesay present age
The present age of Sesay is found as the 35 years.
Explain the term twice of the number?The term "twice" simply implies "multiply by two." Typically, when working with numbers in algebra, we don't know their values; instead, we only refer to them as variables and express them with letters. The quantity in question in this instance is x. Similar to how twice 3 is written as 23,For the stated question;
Let the age of Sesay five years ago be 'x'.
Then, the age of Muskam is twice of Sesay be '2x'.
The sum of their present ages after 5 years is;
(x + 5) + (2x + 5) = 100
3x + 10 = 100
3x = 90
x = 30 (Age of Sesay 5 years ago)
Present age of Sesay = x + 5 = 30 + 5 = 35 years.
Thus, the present age of Sesay is found as the 35 years.
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a computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue (in thousands of dollars) he can make on the full version of the new shareware. attached below is the output from a simple linear regression along with the residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed. what is the correct null hypothesis for testing whether there is a linear relationship between revenue and the number of downloads?
We can say that there is sufficient evidence that revenue and the number of downloads are linearly related.
What is the null hypothesis?
The null hypothesis is a common statistical theory that asserts that no statistical relationship or significance exists between two sets of observed data and measured phenomena based on a single observed variable.
Hypothesis:
[tex]H_0:\rho_1=0\\H_1:\rho\neq0[/tex]
Test statistic:
[tex]t=r\times\sqrt{\frac{n-2}{1-r^2} }\\\\ t=(0.8691)\times\sqrt{\frac{30-2}{(1-0.8691)^2} } \\\\t=9.2974[/tex]
D.F. = n - 2 = 28
P-value = P-value at t = 9.2974, ∝=0.05, 28 d.f. is
P-value = 0.000
Conclusion: Since. P-value < ∝=0.05, so we have to reject the null hypothesis.
Hence, we can say that there is sufficient evidence that revenue and the number of downloads are linearly related.
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Is the following relation a function?
Answer:
Yes
Step-by-step explanation:
The following data set represents the ages of all six grandchildren in a family. Find the variance for this data set of ages: 6,3,14,11,14,6 round the final answer to one decimal place.
The variance for the data set is 18.
What is a variance?
The term variance refers to a statistical measurement of the spread between numbers in a data set. More specifically, variance measures how far each number in the set is from the mean (average), and thus from every other number in the set.
Here we have to find the variance for this data set.
Given data:
The age of six grandchildren in a family is = 6, 3, 14, 11, 14, 6
The mean = 6+3+14+11+14+6/ 6
= 9
The variance = (6-9)² + (3-9)² + (14-9)² +(11-9)² + (14-9)² + (6-9)²/ 6
= 9+36+25+4+25+9/ 9
= 18
Therefore the variance is 18.
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an auditor selects a sample from the file of shipping documents to determine whether invoices were prepared for this sample. this test is to satisfy the audit objective of
An auditor selects a sample of shipping documents to examine whether invoices were created for this sample. The fundamental objective of the audit, Completeness, will be satisfied by this test.
Given,
An auditor picks a sample of shipping papers to examine if the related sales invoices were produced.
We need to determine what kind of audit aim will be the focus of this test's evidence gathering;
Audit purpose;
An audit's objective is to form an unbiased evaluation of the entity's financial statements. It is a component of the opinion if the financial statements give a true and fair picture and have been accurately prepared in accordance with accounting rules.
Here,
The audit objective completion test was carried out by the auditor to acquire proof.
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The question is incomplete. Completed question is given below;
An auditor selects a sample of shipping documents in order to determine if the related sales invoices were prepared. This test would gather evidence concerning which audit objective?
A) Completeness
B) Detail tie-in
C) Occurrence
D) Realizable value
A factory makes components used in jet engines, including reinforced steel washers. The washers are required to have a very precise thickness. The thickness of the washers follow a normal distribution with mean 1. 59 millimeters and standard deviation 0. 042 millimeters. A technician randomly samples washers and calculates the mean of their thicknesses, which is. What is the probability that ?.
The probability that [tex]\bar{x}[/tex] < 1.57 for the given mean, standard deviation , and samples is equal to 0.0162.
As given in the question,
Normal distribution with mean 'μ' = 1.59 millimeters
Standard deviation 'σ' = 0.042 millimeters
Sample size 'n' = 20
standard error = σ /√n
= 0.042 / √20
= 0.00933
Probability that [tex]\bar{x}[/tex] < 1.57 is
X = 1.57
s = 0.0093
P( X < 1.57)
= P[ (X -μ)/s < ( 1.57 - 1.59)/ 0.0093]
= P ( z < -2.14 )
Using z - table p value is
= 0.01617
= 0.0162
Therefore, the probability for the [tex]\bar{x}[/tex] < 1.57 is equal to 0.0162.
The complete question is :
A factory makes components used in jet engines, including reinforced steel washers. the washers are required to have a very precise thickness. the thickness of the washers follow a normal distribution with mean 1.59 millimeters and standard deviation 0.042 millimeters. a technician randomly samples n = 20 washers and calculates the mean of their thicknesses, which is x¯. what is the probability that x¯<1.57?
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A ferris wheel is 45 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 10 minutes. The function h = f(t) gives your height in meters above the ground t minutes after the wheel begins to turn. What is the Amplitude? meters What is the Midline? y = meters What is the Period? minutes How High are you off of the ground after 4 minutes? meters
If the wheel rotates clockwise, the height function is h(t) = 28.5 + 22.5sin(270 - 36t).
The function's central axis for the height of the Ferris wheel's center is given by h = f(t).
= 6 + 45 ÷ 2 = 6 + 22.5 = 28.5 meters.
The wheel rotates at a speed of 36 degrees per minute since the period of revolution is 10 minutes.
The wheel's direction of rotation—clockwise or counterclockwise—is not specified.
Let's look at both situations:
The present angle, assuming it spins clockwise, is equal to 270 – 36t degrees, where t is the duration in minutes.
Then the height function h = f(t)
= 28.5 + 22.5sin(a)
= 28.5 + 22.5sin(270 - 36t)
If the wheel rotates anti-clockwise, the current angle is
b = 270 + 36t degrees.
Then the height function
h = r(t)
= 28.5 + 22.5sin(b)
= 28.5 + 22.5sin(270 + 36t)
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if a population begins with 25 individuals and grows exponentially for 20 generations with an r value of 0.2, then the greatest percentage increase will occur: please choose the correct answer from the following choices, and then select the submit answer button. answer choices from generation 11 to 12. from generation 5 to 6. from generation 1 to 2. from generation 19 to 20.
Answer: from generation 19 to 20.
Step-by-step explanation:
The greatest percentage increase will occur from generation 19 to 20 as the exponential power will be highest.
What is exponential growth?
Exponential growth happens once the larger in size you're the quicker you grow that causes you to even larger in size. it's the expansion characterised by interest, or growth. it's known as exponential growth as a result of it will solely be delineate mathematically by inserting time within the exponent or power of the bottom. Population then is adequate to the population at the current times some discretional range to the facility of the expansion rate times the time. The discretional range is sometimes two then the expansion rates is given because the reciprocal of the doubling time.
Main body:
initial population = 25
Total generation = 20
growth rate = 0.2
General formula of exponential function = aˣ
here a = 25 and x = 0.2
⇒25⁰°²
= 1.9
hence total population = 25+2 = 27
So it is clear that in 19 to 20 generation , growth will be highest.
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a ship leaves port at noon and has a bearing of s 23° w. the ship sails at 10 knots. (a) how many nautical miles south and how many nautical miles west will the ship have traveled by 6:00 p.m.? (round your answers to two decimal places.) miles south miles west (b) at 6:00 p.m., the ship changes course to due west. find the ship's bearing and distance from port at 7:00 p.m. (round your answers to one decimal place.) s ° w nautical miles
(a) 52.475nm many nautical miles south and 29.09nm many nautical miles west will the ship have traveled by 6:00 p.m.
(b) at 6:00pm the ship changes course to due west when 36.68° the ship's bearing and distance from port at 7:00 p.m.
Given that,
A ship sets out from port at noon with a bearing of s 23° west and a speed of 10 knots.
We have to find
(a) By the time it gets dark at six o'clock, how far south and west will the ship have sailed? The ship alters its course to head due west at 6:00 p.m. miles south miles west
(b). at 7:00 p.m., determine the ship's bearing and distance from the port. nautical miles in s.
We know that,
(a) For 6:00 p.m
Sin(θ)=opposite/ hypothesis
θ=29
Opposite=west
Hypothesis =60
Sin(29°)=w/60
w=29.09nm
West= 29.09nm
Cos(θ)=adjacent/ hypothesis
θ=29
Adjacent= south
Hypothesis =60
Cos(29°)= south/60
south=52.475nm
Therefore, 52.475nm many nautical miles south and 29.09nm many nautical miles west will the ship have traveled by 6:00 p.m.
(b) tan(θ)=opposite/adjacent
Opposite=29.09nm
Adjacent= 52.475nm
Tan(θ)=29.09nm/52.475nm
θ=36.68°
Therefore, at 6:00pm the ship changes course to due west when 36.68° the ship's bearing and distance from port at 7:00 p.m.
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A mom mixes 9ounces of juice with 3 ounces of water. What percent of the drink is juice?
Answer: 75%
Step-by-step explanation:
9 + 3 = 12
9/12 = 3/4
3/4 = 75%