quotient is 6 and the remainder is 23
Grade 12 calculus and vectors question:
“Determine the vector equation of a line through (4,5,5) that is perpendicular to the line (x,y,z) = (11,-8,4) + t(3,-1,1)”
The line
\((x,y,z)=(11,-8,4)+t(3,-1,1)\)
runs in the direction of its tangent vector; we can get it by taking its derivative:
\(\vec T=\dfrac{\mathrm d}{\mathrm dt}\left[(11,-8,4)+t(3,-1,1)\right]=(3,-1,1)\)
Any line that runs perpendicular to this line will have a tangent vector that is orthogonal to \(\vec T\) above. So construct some vector \(\vec v\) that satisfies this.
\(\vec v=(x,y,z)\)
\(\vec v\cdot\vec T=(x,y,z)\cdot(3,-1,1)=3x-y+z=0\)
Suppose \(z=0\); then \(3x=y\), and we can pick any two values that satisfy this condition. For instance,
\(\vec v=(1,3,0)\)
And of course,
(1, 3, 0) • (3, -1, 1) = 3 - 3 + 0 = 0
so \(\vec v\) and \(\vec T\) are indeed orthogonal.
Now, the line running in the direction of \(\vec v\) and passing through the origin can be obtained by scaling
\((x,y,z)=(4,5,5)+t(1,3,0)\)
More generally, if you have a direction/tangent vector \(\vec v\) and some point \(\vec p\), the line through \(\vec p\) is given by
\((x,y,z)=\vec p+t\vec v\)
A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of0.20 hours. A consultant has developed a new instruc- tional booklet intended to reduce the time an inexpe- rienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 nov- ices require a mean of 2.90 hours to complete the job. Assuming the population of times is normally distrib- uted, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Determine and interpret the p-value for the test.( DATA SET ) Note: Exercises 10.33 and 10.34 require a computer and statistical software.
Testing the hypothesis using the z-distribution, it is found that since the p-value of the test is of 0.0262 < 0.05, it can be concluded that the new booklet is effective.
At the null hypothesis, we test if there has been no improvement, that is, the time is still of 3 hours. Hence:
\(H_0: \mu = 3\)
At the alternative hypothesis, we test if there has been improvement, that is, the time is of less than 3 hours. Thus:
\(H_1: \mu < 3\)
We have the standard deviation for the population, thus, the z-distribution is used. The test statistic is given by:
\(z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}\)
The parameters are:
\(\overline{x}\) is the sample mean.\(\mu\) is the value tested at the null hypothesis.\(\sigma\) is the standard deviation of the population.n is the sample size.In this problem, the values of the parameters are: \(\mu = 3, \sigma = 0.2, \overline{x} = 2.9, n = 15\).
Then, the value of the test statistic is:
\(z = \frac{2.9 - 3}{\frac{0.2}{\sqrt{15}}}\)
\(z = -1.94\)
The p-value of the test is the probability of finding a sample mean of 2.9 hours or less, which is the p-value of z = -1.94.
Looking at the z-table, z = -1.94 has a p-value of 0.0262.
Since the p-value of the test is of 0.0262 < 0.05, it can be concluded that the new booklet is effective.
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jason drove for three hours at an average speed of 55 miles per hour how far did he go?
Answer: 165 miles
Step-by-step explanation: In order to figure out the answer, you must do 55 x 3 because he drove for 3 hours at 55 mph so you could break it up and go 50 x 3 to equal 150 and 5 x 3 to equal 15 and add those to get 165.
Answer:
The answer is 165miles
Step-by-step explanation:
\(distance = speed \times time\)
d=55×3
d=165 miles
The sector of a circle has an area of 104pi/9
square inches and a central angle with measure 65 degree
. What is the radius of the circle, in inches?
Answer:
Given:
Area of the sector (A) = 104π/9 square inches
Central angle (θ) = 65 degrees
The formula for the area of a sector of a circle is:
A = (θ/360) * π * r^2
We can rearrange this formula to solve for the radius (r):
r^2 = (A * 360) / (θ * π)
Plugging in the given values:
r^2 = (104π/9 * 360) / (65 * π)
r^2 = (104 * 40) / 9
r^2 = 4160 / 9
r^2 ≈ 462.22
Taking the square root of both sides:
r ≈ √462.22
r ≈ 21.49
Therefore, the radius of the circle is approximately 21.49 inches.
Answer: 8 inches
Step-by-step explanation:
PLEASE ASAP I WILL MARK BRAINLIST
Answer:
a. quotient refers to division
Find the sum and express it in simplest form.
(-2y3 + 2y2 - 9) + (-4y3 + 5y2 + 7)
Answer:
-6y^3+7y^2-2
Step-by-step explanation:
(-2y^3+2y^2-9)+(-4y^3+5y^2+7)
-2y^3-4y^3+2y^2+5y^2-9+7
-6y^3+7y^2-2
how do you find out whether somethings a function or not?
Step-by-step explanation:
if you can put a vertical line through it and it only touches the line once it's a function
Answer:
Step-by-step explanation:
The price of a phone is decreased by 19% and now is $319.14. Find the original price
The cost of a phone has lowered by 19% to $319.14 from its original $394 pricing.
what is percentage ?In arithmetic, a percentile is a number or statistic that is given as a fraction of 100. Occasionally, the acronyms "pct.," "pct," nor "pc" are also used. But it is broadly classified into the following by the cent sign, "%." The % amount has no characteristics. Percentages are essentially integers when the denominator is 100. Use the percent sign (%) to indicate that a number is a percentage by placing it close to it. For instance, you score a 75% if you properly answer 75 so out 25 pages on a test (75/100). Divide the money by the whole and multiply the results by 100 you compute percentages. The formula for calculating the percentage is (value/total) x 100%.
given
Put this together using the conditions given: 319.14 / (1- 19%)
Determine the total or difference: 319.14 / 0.81
Diminish the fraction: 394
Response: 394
The cost of a phone has lowered by 19% to $319.14 from its original $394 pricing.
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A $5000 investment pays 3% interest compounded monthly. To the nearest cent, what will be the value of the investment after 10 years?
Answer:
We can use the formula for compound interest to solve this problem. The formula is:
A = P * (1 + r/n)^(n*t)
where:
A = the amount of money after t years
P = the principal amount (the initial investment)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the number of years
In this case, P = $5000, r = 0.03, n = 12 (since the interest is compounded monthly), and t = 10. Plugging these values into the formula, we get:
A = 5000 * (1 + 0.03/12)^(12*10)
A = 5000 * (1.0025)^120
A ≈ $6,621.36
So the investment will be worth approximately $6,621.36 after 10 years.
three artist each painted 27 frog and 15 lions two other artist each painted the same number of lions and twice as many frogs.how many animals did the five paint in all?
Find the area of this shape 3in, 4in, 8in, 5in, 4in, 8in
Answer:
44in²
Step-by-step explanation:
3 × 4 =12
4 × 8 = 32
12 + 32 = 44
good luck, i hope this helps :)
Answer: 44 \(in^{2}\)
Step-by-step explanation:
(Make this into two shapes. I made a horizontal line. You can label them as shape/rectangle A & shape/rectangle B)
Area of rectangle= L×W
Shape A area= 3×4= 12\(in^{2}\)
Shape B area= 8×4= 32\(in^{2}\)
TOTAL Area= 32\(in^{2}\)+12
=44\(in^{2}\\\)
-3x+5y=2x+3y−3x+5y=2x+3y Which ordered pair is a solution of the equation?
Answer:
the answer is neither
Step-by-step explanation:
I MARK BRAINLIEST AGAIN IF U HELP ME
whats 56-123x + 78 when x = 3
I want someone to try to diss me
Answer:
56-123x+78 = -235
Step-by-step explanation:
too lazy for a diss.
56-123(3)+78
56-369+78
-313+78
-235
(could be wrong)
Answer:
-235
Step-by-step explanation:
56 - 123(3) =
56 - 369 = -313
-313 + 78 = -235
MEH SORRY AGAIN
What the answer pls answer fast!
Answer:
The answer is 2700 m
Answer:
1440 I hope this helps you
What is the starting term of 64?
Answer:
1
Step-by-step explanation:
One is the starting term
1, 2, 4, 8, 16, 32, 64, 128, 256,
1) The original price of a radio is $78.50 and was discounted 12% off. What is the sale price? not in college don't know why it says I am lol
Answer:$69.08
Step-by-step explanation:
Last week, Roberto worked 48 hour hours at Starbucks. Find his gross earnings for the week if he is paid $9.80 per hour and earns time and a half for all hours worked over 40 hours
9.8 per hours
time and a half for hours worked over 40
48 hours - 40 hours = 8 hours over 40
9.8 + (9.8/2 ) = 14.7 per hour over 40
Gross earning: (9.80 x 40 ) + ( 14.7 x 8 ) = 392+117.6 = $509.6
istg if this doesnt show.
Sorry but I don't see anything but your words...
What am I supposed to be answering?
Answer:
Nv5 my dude
Step-by-step explanation:
Compute for the mean expenses of the XYZ Corporation given the following: Name Total Sales Total Expenses Quezon City 14,950.00 4,933.50 Caloocan City 18,290.00 6,035.70 Marikina City 37,200.00 12,276.00 Cebu City 18,900.00 6,237.00 Davao City 45,000.00 14,850.00 Mandaluyong City 23,000.00 7,590.00 Cavite 22,000.00 7,260.00 Laguna 21,000.00 6,930.00 Manila 66,000.00 21,780.00 Iloilo 34,000.00 11,220.00
The computed mean expenses of the XYZ Corporation based on the given information are 9,911.22.
What is the mean?The mean refers to the average value.
The mean is computed as the quotient that results from dividing the total value of the data set by the number of items in the set.
Name Total Sales Total Expenses
Quezon City 14,950.00 4,933.50
Caloocan City 18,290.00 6,035.70
Marikina City 37,200.00 12,276.00
Cebu City 18,900.00 6,237.00
Davao City 45,000.00 14,850.00
Mandaluyong City 23,000.00 7,590.00
Cavite 22,000.00 7,260.00
Laguna 21,000.00 6,930.00
Manila 66,000.00 21,780.00
Iloilo 34,000.00 11,220.00
Total 99,112.20
Mean Expenses = 9,911.22 (99,112.20 ÷ 10)
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an airplane takes 3 hours to travel a distance of 1440 miles with the wind. The return trip takes 4 hours against the wind. Find the speed of the plane in the still air and the speed of the wind.
Answer:
The speed of the plane in the still air is 420 miles/hour
The speed of the wind 60 miles/hour
Step-by-step explanation:
Let the speed of the plane with the wind be v
Let the speed of the plane against the wind be u
Now, speed = distance/time
With the wind,
v = (1440 miles)/(3 hours) = 480 miles/hour
v = 480 miles/hour
Against the wind,
u = (1440 miles)/(4 hours) = 360 miles/hour
u = 360 miles/hour
Now, let the speed of plane be p, and speed of wind be w,
Now, with the wind, the speed is 480 mph,
so,
speed of plane + speed of wind = 480 mph
p + w = 480 (i)
and against the wind, the speed is 360 mph,
so,
speed of plane - speed of wind = 360mph
p-w = 360 (ii)
adding equations (i) and (ii), we get,
p+w + p-w = 480 + 360
2p = 840
p = 840/2
p = 420 miles/hour
Then, the speed of the wind will be,
p + w = 480,
420 + w = 480
w = 480 - 420
w = 60 miles/hour
The speed of the plane in still air is calculated to be 420 mph, and the speed of the wind is calculated to be 60 mph by solving the two simultaneous equations obtained from the time, rate, and distance relationship.
Explanation:This problem is about the rate, time, and distance relationships. The rate at which the airplane travels in still air is r (unaffected by wind), and the speed of the wind is w. When the plane flies with the wind, it is 'assisted' and therefore travels faster - at a speed of (r + w); against the wind, it travels slower - at a speed of (r - w).
From the problem, we know that:
The trip with the wind covers 1440 miles in 3 hours, so (r + w) * 3 = 1440The return trip against the wind covers the same 1440 miles in 4 hours, so (r - w) * 4 = 1440By solving these two equations, we get the following:
r + w = 480r - w = 360Adding these two gives 2r = 840 => r = 420 mph (the speed of the plane in still air), and subtracting gives 2w = 120 => w = 60 mph (the speed of the wind).
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Victoria opens a saving account with $200. She earns 1.6% interest. How much will she have after 4 years?
Answer:
i think it is 212.8
Step-by-step explanation:
Answer: it’s 212.8
Step-by-step explanation:
What is the answer to this because I can’t find the answer
2. The value of 87.5 percent of 104 is 91.
3. The value of 20.8 is 32% of65.
What is percentage?
A percentage in mathematics is a number or ratio that may be stated as a fraction of 100.In determining a percentage of a number, we should first divide it by 100 before multiply the outcome by 100. As a result, the proportion refers to a part per 100. The word "percent" refers to a fraction of one hundred. The letter "%" stands for it.
Assume that x% of 104 is 91.
Therefore,
x% of 104 = 91
(x/100) × 104 = 91
Multiply both sides by 100:
104x = 9100
Divide both sides by 104
x = 9100/104
x = 87.5
Assume that 32% of y is 20.8.
Therefore,
32% of y = 20.8
(32/100) × y = 20.8
Multiply both sides by 100:
32y = 2080
Divide both sides by 32
y = 2080/32
x = 65
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When a 3-D figure cut to create a cross-section parallel to the base which direction is the perpendicular vertical or horizontal 
Answer:
When a 3D figure is cut to create a cross-section parallel to the base, the direction of the perpendicular is vertical. This means that the cross-section will be perpendicular to the base and will have a vertical orientation.
Solve the equation 2/3x - 1/5x = x - 1
Answer:
To solve the equation:
2/3x - 1/5x = x - 1
First, we need to find a common denominator for 2/3 and 1/5, which is 15. So we can rewrite the equation as:
(10/15)x - (3/15)x = 15/15 x - 1
Simplifying the left side:
(7/15)x = 15/15 x - 1
Multiplying both sides by 15:
7x = 15x - 15
Subtracting 7x from both sides:
-8x = -15
Dividing both sides by -8:
x = 15/8 or 1.875
Therefore, the solution to the equation is x = 1.875.
find the volume of the figure
Answer:
Step-by-step explanation:
base area=41.57 in²
height=9 in
volume=41.57×9=374.13 in³
Convert this vector equation to cartesian form using the vector product.
r = i - 5j + 4k + λ(3i + j - 2k) + µ(-i + 2j + k)
Answer:
\(5x-y+7z-38=0\)
or
\(5x-y+7z=38\)
Step-by-step explanation:
Given vector equation:
\(\textbf{r} = \textbf{i} - 5\textbf{j} + 4\textbf{k} + \lambda(3\textbf{i} + \textbf{j} - 2\textbf{k}) + \mu(-\textbf{i} + 2\textbf{j} + \textbf{k})\)
The vector 3i + j - 2k is perpendicular to n.
The vector -i + 2j + k is perpendicular to n.
\(\textsf{So}\;\;\textbf{n}=\left|\begin{array}{ccc}\textbf{i}&\textbf{j}&\textbf{k}\\3&1&-2\\-1&2&1\end{array}\right|\)
\(=\textbf{i}\left|\begin{array}{rr}1&-2\\2&1\end{array}\right|-\textbf{j}\left|\begin{array}{rr}3&-2\\-1&1\end{array}\right|+\textbf{k}\left|\begin{array}{rr}3&1\\-1&2\end{array}\right|\)
\(=\textbf{i}(1 \cdot 1 - (-2) \cdot 2)-\textbf{j}(3 \cdot 1-(-2) \cdot (-1))+\textbf{k}(3 \cdot 2-1 \cdot (-1))\)
\(=\textbf{i}(1 +4)-\textbf{j}(3-2)+\textbf{k}(6+1)\)
\(=5\textbf{i}-\textbf{j}+7\textbf{k}\)
So the equation of the plane written in Cartesian form is:
\(5x-y+7z+d=0\)
Substituting (1, -5, 4) gives:
\(5(1)-(-5)+7(4)+d=0\)
\(5+5+28+d=0\)
\(38+d=0\)
\(d=-38\)
Therefore, the given vector equation in Cartesian form is:
\(5x-y+7z-38=0\)
or
\(5x-y+7z=38\)
match the base to the corresponding height
Answer:All equal
Step-by-step explanation:
Gina puts $5500 into an account earning 5.25% interest compounded continuously how long will it take for the amount in the account to go to $7450
Using the formula of compound interest, the number of years is 7.6 years
What is compound interest?Compound interest is the interest calculated on the principal and the interest accumulated over the previous period. It is different from simple interest, where interest is not added to the principal while calculating the interest during the next period.
The formula of compound interest is given as;
\(A = P(1 + \frac{r}{n} )^n^t\)
A = Compounded InterestP = Principalr = raten = number of times compoundedt = number of years.But in this case, the interest was compounded continuously
\(A = Pe^r^t\)
Substituting the values into the formula;
\(7450 = 5500e^(^0^.^0^5^2^5 ^* ^t^)\)
Solving for t;
t = 7.6 years
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A boy walks 5km due north and then 4km due east. Find the bearing of his current position from the starting point, how far is the boy now from the starting point