Answer:
90
Step-by-step explanation:
60+30 is 90
1A ball is launched vertically upward at 19.6
meters per second from a 102.9 meter tall
building. The height of the ball is modeled by the
function f(t) = -4.0t² + 19.6t + 102.9. How many
seconds after launch does the ball strike the
ground?
The time after which the ball strike the ground is \(t = \frac{49(5+\sqrt{5}) }{100}\) or;\(t = \frac{49(5-\sqrt{5}) }{100}\) seconds.
The speed of the ball when launched vertically upward is 19.6 m/s².
The acceleration of the ball, g = - 9.8 m/s²
The final velocity of the ball will be 0 m/s since the ball will reach the maximum height and the ball stops.
u = 0 m/s
Using the equation of motion,
v² = u² + 2as
v² = u² + 2(-g)s
v² = u²- 2gh
( 19.6 )² = 0 - 2(10)h
384.16 = -20h
h = - 19.208 m
Therefore, the total height reached by the ball is 102.9 + 19.208 = 122.108 m
Now, the function for the height of the ball is:
f(t) = - 4t² + 19.6t + 102.9
122.108 = - 4t² + 19.6t + 102.9
- 4t² + 19.6t + 102.9 - 122.108 = 0
- 4t² + 19.6t - 19.208 = 0
4t² - 19.6t + 19.208 = 0
Multiplying by 1000 on each side of the equation.
4000t² - 19600t + 19208 = 0
Solving the quadratic equation,\(t =[\frac{ - ( - 19600 ) \pm \sqrt{(-19600)^{2}-4(4000)(19208)} }{2(4000)} ]\)
Therefore,
\(t = \frac{49(5+\sqrt{5}) }{100}\) or;
\(t = \frac{49(5-\sqrt{5}) }{100}\)
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Click on all the shapes that can be created by cutting a rectangular pyramid perpendicular to its base.
A. pentagon
B. rectangle
C. square
D. trapezoid
E. triangle
The shape that we obtained will be a triangle. Then the correct option is E.
What is the pyramid?In terms of geometry, a pyramid is a polygon that is created by joining an apex and a polygonal base. A triangle known as a lateral face is formed by each base edge and apex. It has a polygonal basis and is a conic solid. There are n + 1 points, n + 1 sides, and 2n edges in a pyramid with an n-sided base. Every pyramid is dual in itself.
If the base of the pyramid is a rectangle then the pyramid is known as a rectangular pyramid.
If the pyramid is separated by slicing a rectangular pyramid perpendicular to its base. Then the shape that we obtained will be a triangle.
Then the correct option is E.
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Write a polynomial equation with integer coefficients that have the given roots. y=4, y=−3
Answer:
(y-6)*(y-4) = 0
Step-by-step explanation:
If the polynomial zeroes are 4 and -3 then the factors of the polynomial are (y - 4) and (y + 3). Then the polynomial is y² - y - 12.
What is polynomial?Polynomial is an algebraic expression that consists of variables and coefficients. Variables are called unknown. We can apply arithmetic operations such as addition, subtraction, etc. But not divisible by variable.
The roots of the polynomial factors are 4 and -3.
Then the polynomial factors will be (y - 4) and (y + 3).
Then the polynomial will be
(y - 4) (y + 3)
y² - y - 12
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four equals the difference of eight and a number and the result is divided by four
Answer:
(8-n=4)/4 click brainliest please and click thanks
Step-by-step explanation:
The mathematical expression which represents the phrase four equals the difference between eight and a number and the result is divided by four is (4 = 8 - x)/4.
What is an expression?A mixture of variables, numbers, addition, subtraction, multiplication, and division are called expressions.
A statement expressing the equality of two mathematical expressions is known as an equation.
As per the given,
Difference of 8 and a number x = 8 - x
4 equal to 8 - x
4 = 8 - x
Now,
The result is divided by 4
Therefore,(4 = 8 - x)/4
Hence "The mathematical expression which represents the phrase four equals the difference between eight and a number and the result is divided by four is (4 = 8 - x)/4".
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Find an irrational number that is between 5.2 and 5.5
Answer:
answer is 5.3 cuz I am smart I learned this so I'm here to help
Solve x^2+8x+22=0 by completing the square.
Answer: x = √-6 - 4
Step-by-step explanation:
x^2+8x+22=0
(x+4)^2 - 16 + 22 = 0
(x+4)^2 + 6 = 0
(x+4)^2 = -6
√(x+4)^2 = √-6
x = √-6 - 4
√6 = 2.449
The bases of a trapezoid are 8 yards and 16 feet. The height of the trapezoid is 12 feet. What is area of the trapezoid in square feet?
Answer:
240 sq ft
Step-by-step explanation:
First turn the 8 yards to feet my multiplying by 3. You get 24.
Then
Add the bases together to get 40 Divide them by the number of bases (2) to get 20
Multiply the 20 by the height, (12) to get 240
240 sq feet
Mark me as brainliest if this helps!
If θ is an angle in standard position and its terminal side passes through the point (-7,24), find the exact value of sec θ sec θ in simplest radical form.
By applying the Pythagorean Theorem, we may determine that the student estimated tanθ, sinθ, cosecθ, and cotθ values incorrectly.
What is the Pythagorean theorem?The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a basic relationship between a right triangle's three sides in Euclidean geometry.
According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.
The Pythagorean Theorem states that the squares on the hypotenuse (the side across from the right angle) of a right triangle, or, in standard algebraic notation, a² + b², are equal to the squares on the legs.
So, the Pythagorean theorem can be used to find the value of the hypotenuse, which is the first step in determining the trigonometric function.
H² = P² + B²
Now change the value of the terms in the equation above to their known values.
H² = 7² + 24²
H² = 49 + 576
H² = 625
H = 25
The trigonometric functions' values at this time are as follows:
cosθ = -7/25
sinθ = -24/25
tanθ = 24/7
cosecθ = 25/24
secθ = 25/-7
cotθ = 7/24
Therefore, by applying the Pythagorean Theorem, we may determine that the student estimated tanθ, sinθ, cosecθ, and cotθ values incorrectly.
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Complete question:
The point (-7, -24) is on the terminal ray of angle θ which is in standard position. A student found the six trigonometric values for angle θ. The student’s answers are shown
The water depth of a pond is initially 36 inches and decreases at a rate of 0.2 inches per day through evaporation. Write a linear function that represents the depth of the pond at a given time.
Answer:
36-0.2d
Step-by-step explanation:
d refers to the number of days
This should work for your question if not I'm very sorry
The required expression for the decreasing depth of the pond is y = 36 - 0.2x, Where y is the depth of the pond after x days.
The equation is the relationship between variables and constants represented as y = ax + b is an example of a polynomial equation.
Here,
The water depth of a pond is initially 36 inches
The water depth of a pond decreases at a rate of 0.2 inches per day through evaporation.
Let the number of the days be x , and the depth left be y
According to the question,
Total depth in x days = 0.2x
Total remaining depth = 36 - 0.2x
or
y = 36 - 0.2x
Thus, the required expression for the decreasing depth of the pond is y = 36 - 0.2x, Where y is the depth of the pond after x days.
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One of the advantages to an employer of paying employees piece rate or commission is that the employee is paid based solely on their performance. What is one disadvantage of this type of pay?
One main disadvantage of piece rate or commission pay is low quality.
Piece rate payPiece rate or commision pay involves paying workers based on coverage or performance. This way the company is able to cut short excess salary especially for low performing workers.
However, a notable disadvantage of piece-rate pay is that it can lead to employees sacrificing quality for quantity. When employees are paid based on the number of units they produce, they may be tempted to produce low-quality products in order to meet their quotas. This can damage the company's reputation and lead to customer dissatisfaction.
Therefore, piece rate pay will often lead to quality reduction.
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1) Convert 0.469 dam to cm.
HELP ME PLEASEEEEEEEEEEEE
Answer:
The area is 112.
Step-by-step explanation:
14 x 16 = 224
224/2 = 112
In which data set does the range have the greatest spread?
A. 10, 11, 11, 14, 14
B. 10, 13, 13, 14, 15
C. 9, 11, 11, 13, 14, 15, 16
D. 8, 11, 13, 13, 17, 20, 23
Answer:
D (8, 11, 13, 13,17,20,23)
Step-by-step explanation:
I did this and got it correct.
What transformation is represented by the function f(x)=2sin(x−π/2)
up 2
down 2
left π/2
right π/2
down π/2
Answer:
right π/2
Step-by-step explanation:
The function f(x) = 2sin(x - π/2) is a sine function with a period of 2π, an amplitude of 2, and a phase shift of π/2. The phase shift of π/2 causes the graph of the function to be shifted π/2 units to the right. .
Therefore, the correct answer is right π/2
Help would really be needed asap!
Answer:
C
Step-by-step explanation:
For lines AC and EF, line FC is a transversal.
Angles ACF and EFC are same side interior angles.
Since their measures add to 180°, then the lines are parallel.
Answer: Choice C
A student ran a distance of 3 1/2miles each day for 5 days. Then the student ran a distance of 4 1/4 miles each day for the next 5 days. What was the total distance in miles the student ran during these 10 days?
Answer:
To find the total distance, we need to add up the distance the student ran in the first 5 days and the distance the student ran in the next 5 days.
Distance for the first 5 days = 3 1/2 miles/day × 5 days = 17.5 miles
Distance for the next 5 days = 4 1/4 miles/day × 5 days = 21.25 miles
Total distance = Distance for the first 5 days + Distance for the next 5 days
Total distance = 17.5 miles + 21.25 miles
Total distance = 38.75 miles
Therefore, the student ran a total of 38.75 miles during these 10 days.
Study the spinner below. If wedges 2 and 5 are each twice the area of one of
the other wedges, what is the likelihood of landing on 2 or 3?
Using the probability concept, the likelihood of landing on 2 or 3 is given by:
\(p = \frac{3}{8}\)
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
Researching this problem on the internet, considering the areas of 2 and 5 counting twice, the spinner has 8 areas, out of which 3 are 2 or 3, hence the probability is given as follows:
\(p = \frac{3}{8}\)
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Please look at the pic and help!!
Answer:
4x² + 22x - 12
Step-by-step explanation:
A = bh/2
A = (4x - 2)(2x + 12)/2
A = (8x² + 48x - 4x - 24)/2
A = (8x² + 44x - 24)/2
A = 4x² + 22x - 12
The square root of a whole number is between 600 and 700. The whole number must be between:
Answer:
24 and 27
Step-by-step explanation:
√600 = 24.4
√700 = 27.7
So, the numbers should be around 24 and 27
thus you have option 3
Write three equivalent ratios for 14/2
Answer:
4/8 4/6
Step-by-step explanation:
those are the only ones I could give but there should be more the step by step is pay attetion in class but if u looks at those they are equal vent so therefore they are its equals
Convert 13
12
from radians to
degrees.
Answer:
195°
Step-by-step explanation:
ASAP! equation of the line in slope-intercept form
Line through (2,6) and perpendicular to y+4=3x
Answer:
y = -1/3x + 6\(\frac{2}{3}\)
Step-by-step explanation:
First, change the original equation to slope intercept form:
y + 4 = 3x
y = 3x - 4
Now, find the slope of the perpendicular line. It will be the opposite reciprocal:
The opposite reciprocal of 3 is -1/3.
Next, plug this into the slope intercept equation along with the given point, so we can solve for b:
y = mx + b
6 = -1/3(2) + b
6 = -2/3 + b
6.67 = b
So, the equation will be y = -1/3x + 6\(\frac{2}{3}\)
Which pair of undefined terms is used to define the term parallel lines
please help me find DE
You can split up the length of AE into the lengths of the line segments connecting adjacent points:
AE = AB + BC + CD + DE
Plug in everything you know and solve for DE :
9 = (2 1/2) + (4 1/3) + (1 2/3) + DE
Rewrite the mixed numbers as improper fractions with a common denominator.
2 1/2 = 4/2 + 1/2 = 5/2 = 15/6
4 1/3 = 12/3 + 1/3 = 13/3 = 26/6
1 2/3 = 3/3 + 2/3 = 5/3 = 10/6
9 = 54/6
So we have
54/6 = 15/6 + 26/6 + 10/6 + DE
⇒ DE = (54 - 15 - 26 - 10)/6 = 3/6 = 1/2
(It looks as though you will need to enter 1 in the top box and 2 in the bottom one)
A satellite moves through space at a rate of 17, 208 kilometers per hour. What is this number in word form?
Answer:
Seventeen thousand, two hundred and eight kilometers per hour.
M(3,-4) is the midpoint between R(x,y) and S(6,0). Find the coordinates of R
Answer:
R = (0,-8)
Step-by-step explanation:
Let's look at the difference between S, and the midpoint M.
S(6,0) - M(3,-4) = N(3,4) This will help us find R(x,y)
Next, take M, and subtract N from it.
M(3,-4) - N(3,4) = (0,-8). This is the value of R.
Perry has already taken 8 pages of notes on his own, and he will take 1 page during each
hour of class. After attending 33 hours of class, how many total pages of notes will Perry
have in his notebook?
Answer:
41 pages of notes
Step-by-step explanation:
Since he took 1 page of notes for each hour, and attended 33 hours of class, this will add 33 pages of notes to his notebook.
To find the total, add 8 to this, because he already had 8 pages on his own.
33 + 8
= 41
So, he will have 41 pages of notes in his notebook
Answer:
He will have 41 pages of notes in his notebook.
Step-by-step explanation:
(33*1)+8
30*1=30
3*1=3
30+3=33
33+8
41
John starts walking north at 4 ft/s from a point P. Five minutes later Lyudmyla starts walking south at 5 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 minutes after Lyudmyla starts walking?
8.99ft rate is the people moving apart 15 minutes after Lyudmyla starts walking.
We’ve defined x and y to be the distance john and Lyudmila, respectively, have traveled since they started walking.
As these distances are increasing, the rates of change will be positive for both.
dx/dt=4ft/s dy/dt=5ft/s
We can calculate x and y as well:
x= 4ft/s· 20 min · 60 s/min = 4, 800 ft
y = 5ft/s·15 min · 60 s/min = 4, 500 ft
We’re interested in how fast the distance between John and Lyudmyla is changing, the distance is labeled as z. This means we want to find dz/dt
We need an equation that relates x, y, and z. so we can use the Pythagorean Theorem:
It is the way in which you can find the missing length of a right-angled triangle.
It is in the form of a²+b²=c²
(x + y)^2 + 500^2 = z^2
This also gives us that z ≈ 9313.43 ft after the woman has been walking for 15 minutes.
Differentiating this we get
2(x + y) ·(dx/dt +dy/dt )= 2zdz/dt
Plug in our values, and we get that dz/dt ≈ 8.99ft
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Mrs. Crosland asked students to factor the expression 282
8. The students offered the answers shown in the box.
Carlos:
Danny
Trener
2(14%
74x1)
407x - 2)
Which student(s) offered answer(s) equivalent to the original expression?
only Danny
only Irene
both Carlos and Danny
both Carlos and Irene
Well formatted version of the question can be found in the picture attached below :
Answer:
Both Carlos and Irene
Step-by-step explanation:
Given the expression (28x - 8)
Carlos : 2(14x - 4)
Danny : 7(4x - 1)
Irene : 4(7x - 2)
The factored expression Given by Carlos, Irene and Danny can be expanded to check if it gives the same expression as that Given in the question :
Carlos :
2(14x - 4)
2*14x - 2*4
28x - 8
Danny :
7(4x - 1)
7*4x - 7*1
28x - 7
Irene :
4(7x - 2)
4*7x - 4*2
28x - 8
From.the expanded solutions obtained ;
Both Carlos and Irene's solution corresponds to the factored form of the original equation and are Hence correct
Majesty Video Production Inc. wants the mean length of its advertisements to be 35 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 14 ads produced by Majesty.
a. The shape οf the distributiοn οf the sample mean time is nοrmal.
b. The standard error is 0.5345.
What is the standard deviatiοn?Standard deviatiοn is: It is a measure οf hοw spread οut numbers are. It is the square rοοt οf the Variance, and the Variance is the average οf the squared differences frοm the Mean.
Given that:
μ =35
σ = 2
n = 14
a. The shape of the distribution of the sample mean time is normal.
b. To calculate the standard error of the mean time, we would apply this formula,
Standard error :
\($ \rm SE = \frac{ \sigma}{\sqrt{(n)} }\)
\($ \rm SE = \frac{ 2}{\sqrt{(14)} }\)
SE = 0.5345
Thus, the standard error is 0.5345.
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Complete question:
Majesty Videο Prοductiοn Inc. wants the mean length οf its advertisements tο be 30 secοnds. Assume the distributiοn οf ad length fοllοws the nοrmal distributiοn with a pοpulatiοn standard deviatiοn οf 2 secοnds. Suppοse we select a sample οf 16 ads prοduced by Majesty.
a. What can we say abοut the shape οf the distributiοn οf the sample mean time?
b. What is the standard error of the mean time?