Answer:
\(\sum_{i=1}^n w_i *X_i = 2.8*24 = 67.2\)
And for this case we want a gpa of 3.0 taking in count that in this semester he/ she is going to take 16 credits so then the new mean would be given by:
\( \bar X_f = \frac{\sum_{i=1}^n w_i *X_i+w_f *X_f }{24+16} = 3.0\)
And we can solve for \(\sum_{i=1}^n w_f *X_f \) and solving we got:
\( 3.0 *(24+16) =\sum_{i=1}^n w_i *X_i +\sum_{i=1}^n w_f *X_f \)
And from the previous result we got:
\( 3.0 *(24+16) =67.2 +\sum_{i=1}^n w_f *X_f\)
And solving we got:
\( \sum_{i=1}^n w_f *X_f =120 -67.2= 52.8\)
And then we can find the mean with this formula:
\( \bar X_2 = \frac{\sum_{i=1}^n w_f *X_f}{16}= \frac{52.8}{16}=16=3.3\)
So then we need a 3.3 on this semester in order to get a cumulate gpa of 3.0
Step-by-step explanation:
For this case we know that the currently mean is 2.8 and is given by:
\( \bar X = \frac{\sum_{i=1}^n w_i *X_i }{24} = 2.8\)
Where \( w_i\) represent the number of credits and \(X_i\) the grade for each subject. From this case we can find the following sum:
\(\sum_{i=1}^n w_i *X_i = 2.8*24 = 67.2\)
And for this case we want a gpa of 3.0 taking in count that in this semester he/ she is going to take 16 credits so then the new mean would be given by:
\( \bar X_f = \frac{\sum_{i=1}^n w_i *X_i+w_f *X_f }{24+16} = 3.0\)
And we can solve for \(\sum_{i=1}^n w_f *X_f \) and solving we got:
\( 3.0 *(24+16) =\sum_{i=1}^n w_i *X_i +\sum_{i=1}^n w_f *X_f \)
And from the previous result we got:
\( 3.0 *(24+16) =67.2 +\sum_{i=1}^n w_f *X_f\)
And solving we got:
\( \sum_{i=1}^n w_f *X_f =120 -67.2= 52.8\)
And then we can find the mean with this formula:
\( \bar X_2 = \frac{\sum_{i=1}^n w_f *X_f}{16}= \frac{52.8}{16}=16=3.3\)
So then we need a 3.3 on this semester in order to get a cumulate gpa of 3.0
first increase and then rework each by decreasing
a. 400 by 20%
b. 650 by 30%
c.820 by 45%
d. 150 by 2,5%
e. 300 by 5%
f. 420 by 2,5%
Answer:
a. 480 Then 384
b. 845 Then 591.5
c. 1,189 Then 653.95
d. 153.75 Then 149.90625
e. 315 Then 299.25
f. 430.5 Then 419.7375
If the #2 pencil is the most popular, why’s it still #2?
A rectangle has an area of 108 square
centimeters. Its width is 9 centimeters.
What is the perimeter of the
rectangle?
Therefore, the perimeter of the rectangle is 42 centimeters.
What is area?The concept of area is used in many areas of mathematics, science, and everyday life. It is used in geometry to calculate the area of various shapes, such as triangles, circles, and polygons. It is also used in physics to calculate the amount of surface area of an object that is exposed to air or water, and in architecture and engineering to determine the amount of material needed to construct a building or structure.
Here,
To find the perimeter of a rectangle, we need to know its length and width. We are given that the width of the rectangle is 9 centimeters, and the area of the rectangle is 108 square centimeters.
We can use the formula for the area of a rectangle:
Area of rectangle = length x width
Plugging in the values we have:
108cm² = length x 9cm
Solving for the length, we can divide both sides by 9cm:
length = 108cm² / 9cm
length = 12cm
So, the length of the rectangle is 12 centimeters.
To find the perimeter of the rectangle, we can use the formula:
Perimeter of rectangle = 2 x (length + width)
Plugging in the values we have:
Perimeter of rectangle = 2 x (12cm + 9cm)
Perimeter of rectangle = 2 x 21cm
Perimeter of rectangle = 42cm
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How many ways can this be done?
Answer:
140 waysStep-by-step explanation:
"Choose 3 appetizers out of 4" can be written in equation as: C(4,3), and that is 4!/[3!(4-3)!]=4 ways.
For main dishes, C(10,9)= 10!/9!(10-9)!=10 ways.
And for desserts, C(9,5)= 9!/[5!(9-5)!]=126 ways.
So ways in total are 4+10+126=140 ways to pick the meals.
Austin opened a savings account and deposited $600.00 as principal. The account earns 5% interest, compounded annually. What is the balance after 8 years?
Answer:
$886.47
Step-by-step explanation:
True or False.
A 20° angle and a 70° angle can be
composed into a 90° angle.
Vicki has a 50 inch roll of ribbon. She used 3 feet of
the ribbon to wrap a gift. How many inches of ribbon does she
have left?
Answer:
Step-by-step explanation:
50in-3ft(12in/ft)
50in-36in
14in
21 + 11 = y + 3 PLEAS I REALLY NEED SOMEBODY TO ANSWER THIS
Answer:
y = 29
Step-by-step explanation:
21 + 11 = y + 3
32 = y + 3
y + 3 = 32
y = 32 - 3
y = 29
Answer:
Lets flip the equation so that it is more aesthetically pleasing for us
y + 3 = 21 + 11
Ok first of all, we cna add 21 and 11 to get 32
y + 3 = 32
We want to get y all by itself, so we are going to take away the 3.
We are going to put that 3 into the 32, but remember we are subtracting :)
y = 29
There is your answer! :)
Step-by-step explanation:
Hernandez Engineering borrows $5,500, at
6 1/2%
interest, for 120 days. If the bank uses the ordinary interest method, how much interest (in $) will the bank collect? (Round your answer to the nearest cent.)
The answer interest the bank will collect will be $117.53 using simple interest
What is simple interest?
A quick and simple way to figure out interest on money is to use the simple interest technique, which adds interest at the same rate for each time cycle and always to the initial principal amount. Any bank where we deposit our funds will pay us interest on our investment. One of the different types of interest charged by banks is simple interest. Now, before exploring the idea of basic curiosity in further detail,
The formula for simple interest is:
S = p*t*r/100
where P is the principal amount of money, R is the interest rate as a decimal, T is the time.
We know the principal amount is $5500, the interest rate is 6 1/2%, and the time is 120/365 years.
So simple interest will be = $117.53
Hence the interest the bank will collect will be $117.53
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How is the sum expressed in sigma notation?
22 + 27 + 32 + 37 + 42 + 47
Enter your answer by filling in the boxes.
the sum from i is equal to 1 to blank of open paren close paren$$
The sum of the arithmetic sequence is S = 207 and the summation notation is S = ∑i=1 to 6 ( 5n + 17 )
What is Arithmetic Progression?An arithmetic progression is a sequence of numbers in which each term is derived from the preceding term by adding or subtracting a fixed number called the common difference "d"
The general form of an Arithmetic Progression is a, a + d, a + 2d, a + 3d and so on. Thus nth term of an AP series is Tn = a + (n - 1) d, where Tₙ = nth term and a = first term. Here d = common difference = Tₙ - Tₙ₋₁
Sum of first n terms of an AP: Sₙ = ( n/2 ) [ 2a + ( n- 1 ) d ]
Given data ,
Let the arithmetic sequence be represented as A
Now , the value of A is
A = 22 + 27 + 32 + 37 + 42 + 47
The number of terms n = 6
So , the value of i ranges from 1 to 6
Now , the summation is represented as ∑i=1 to 6 ( 5n + 17)
when n = 1
S₁ = 5 ( 1 ) + 17 = 22
when n = 2
S₂ = 22 + 5 ( 2 ) + 17
S₂ = 22 + 27
when n = 3
S₃ = 22 + 27 + 5 ( 3 ) + 17
S₃ = 22 + 27 + 32
Hence , the sum of the arithmetic sequence is S = 207
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A class of 30 music students includes 13 who play the piano, 15 who play the guitar, and 9 who play both the piano and the guitar. How many students in the class play neither instrument?
Answer: 2
Step-by-step explanation:
As given, out of 30 students, 15 play guitar and 13 play piano, thats 28.
Among these, 9 play both the guitar and the piano.
That means, only 2 remaining students play neither instrument. (30-15-13)
Divide .82 into .01476
Problem
Divide .82 into .01476
Solution
For this case we can do the following:
\(\frac{0.82\cdot100000}{0.01476\cdot100000}=\frac{82000}{1476}\)And then we can simplify like this:
\(\frac{82000}{1476}=\frac{41000}{738}=\frac{40500}{369}=\frac{4500}{41}\)And the final answer for this case would be:
4500/41
What is 2×+y=9 in the y=mx+b form?
Answer: y=-2x+9
Step-by-step: Subtract 2x from 2x+y=9 and get y=-2x+9
An ice cream shop ordered a box of 700 cones. When they opened the box, they noticed 164 of the cones were broken. How many cones do they have left? *
Answer:
The answer would be 536 cones.
Step-by-step explanation:
You have to subtract 164 from 700.
700-164=536.
Find the missing side lengths. Leave your answers as radicals in simplest form
Answer:
a = b = 3√2
Step-by-step explanation:
Use trigonometry:
\( \sin(45°) = \frac{a}{6} \)
Cross-multiply to find a:
\(a = 6 \times \sin(45°) = 6 \times \frac{ \sqrt{2} }{2} = \frac{6 \sqrt{2} }{2} = 3 \sqrt{2} \)
Use the Pythagorean theorem to find b:
\( {b}^{2} = {6}^{2} - {a}^{2} \)
\( {b}^{2} = {6}^{2} - ( {3 \sqrt{2}) }^{2} = 36 - 9 \times 2 = 36 - 18 = 18\)
\(b > 0\)
\(b = \sqrt{18} = 3 \sqrt{2} \)
Solve equation by factoring.
2x^2=10x
Answer:
x = 0, x = 5
Step-by-step explanation:
2x² = 10x ( subtract 10x from both sides )
2x² - 10x = 0 ← factor out 2x from each term on the left side
2x(x - 5) = 0
equate each factor to zero and solve for x
2x = 0 ⇒ x = 0
x - 5 = 0 ⇒ x = 5
Assume that the amounts of weight that male college students gain during their freshman year are normally distributed with a mean of μ = 1.1 kg and a standard deviation of o= 4.6 kg.
Complete parts (a) through (c) below.
b. If 25 male college students are randomly selected, find the probability that their mean weight gain during freshman year is between 0 kg and 3 kg.
The probability is
(Round to four decimal places as needed.)
The probability that their mean weight gain during freshman year is between 0 kg and 3 kg is 70%
What is Probability?It is a branch of mathematics that deals with the occurrence of a random event.
Given,
Amounts of weight that male college students gain during their freshman year are normally distributed
mean of μ = 1.1 kg and
Standard deviation of o= 4.6 kg.
Z score=x-μ/o
=25-1.1/4.6
=23.9/4.6
=5.196
Z score=x-μ/o
=25-1.1/0
=0
Z score=25-1.1/3
=23.9/3
=7.966
By observing the z table the probability that their mean weight gain during freshman year is between 0 kg and 3 kg is 70%
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Due today!! Pls helppp
if we that Abby spent 50% of her time on School, 30% on Work, and 20% on Sleep, we can estimate that she spent:
100% - (50% + 30% + 20%) = 100% - 100% = 0% on Other.
What do you mean by spending?If Abby divided her time into four categories (School, Work, Other, and Sleep), the percentage she spent on Other would be 100% less the sum of the percentages she spent on School, Work, and Sleep.
So, assuming Abby spending 50% of her time at school, 30% at work, and 20% sleeping, we can estimate she spent:
On Other, 100% - (50% + 30% + 20%) = 100% - 100% = 0%.
However, this is just a guess based on assumptions about how Abby spent her time. It's difficult to provide a more accurate estimate without more information.
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formula for density
formula for density
Answer:
The formula for density (ρ) is:
Density (ρ) = Mass (m) / Volume (V)
Step-by-step explanation:
Where:
Density is measured in units such as kilograms per cubic meter (kg/m³) or grams per cubic centimeter (g/cm³).Mass is the amount of matter in an object and is typically measured in kilograms (kg) or grams (g).Volume is the amount of space occupied by an object and is typically measured in cubic meters (m³) or cubic centimeters (cm³).what number is the smallest -15, -12, -18, -9
Answer:
-18
Use a number line.
Since -18 is the farthest from 0, it is the answer. Hope it helps!
length of a rectangle is 3 times its width. If the length is 9cm what is the area of the rectangle
Answer:
I think it's 27
because length is 3 times its width
The container that hold the water for the football team is 1/5 full after pouring in 13 gallons of water, it is 7/10 full how many gallons can the container hold
Answer:
100% = 65 Gallons; 70% = 45.5 Gallons
Step-by-step explanation:
The important piece of information here is that 13 gallons of water makes the container 1/5 of the way full, aka 20%. If the question is simply, how many gallons will it hold, then we multiply 13 by 5 to get 100% at 65 gallons. To get the amount held at 7/10, or 70%, we simply multiply 65 with 7/10 to get 45.5 gallons.
Cheers.
State the name of the property illustrated.
V5+(-3) =(-3) + 5
Associative
O Distributive
O Both associative and commutative
>
O Commutative
Answer:
The answer is commutative and associative.
Step-by-step explanation:
help plz I have an f in the class
An arrow is shot from 3 ft above the top of a hill with a vertical upward velocity of 108 ft/s. If it strikes the plain below after 9.5 s, how high is the hill?
If the arrow is launched at t0, then write an equation describing velocity as a function of time?
The height of the hill is approximately 25.73 ft. Where v0 is the initial velocity (108 ft/s), g is the acceleration due to gravity \((-32.2 ft/s^2)\),
To find the height of the hill, we can use the formula for the vertical position of an object under constant acceleration:
h = h0 + v0t + 1/2at^2
where h is the final height, h0 is the initial height, v0 is the initial velocity, t is the time, and a is the acceleration due to gravity (-32.2 ft/s^2).
In this case, we are given that the initial height h0 is 3 ft, the initial velocity v0 is 108 ft/s, and the time t is 9.5 s. We want to find the height of the hill, which we can denote as h_hill. The final height is the height of the plain, which we can denote as h_plain and assume is zero.
At the highest point of its trajectory, the arrow will have zero vertical velocity, since it will have stopped rising and just started to fall. So we can set the velocity to zero and solve for the time it takes for that to occur. Using the formula for velocity under constant acceleration:
v = v0 + at
we can solve for t when v = 0, h0 = 3 ft, v0 = 108 ft/s, and a = -32.2 ft/s^2:
0 = 108 - 32.2t
t = 108/32.2 ≈ 3.35 s
Thus, it takes the arrow approximately 3.35 s to reach the top of its trajectory.
Using the formula for the height of an object at a given time, we can find the height of the hill by subtracting the height of the arrow at the top of its trajectory from the initial height:
h_hill = h0 + v0t + 1/2at^2 - h_top
where h_top is the height of the arrow at the top of its trajectory. We can find h_top using the formula for the height of an object at the maximum height of its trajectory:
h_top = h0 + v0^2/2a
Plugging in the given values, we get:
h_top = 3 + (108^2)/(2*(-32.2)) ≈ 196.78 ft
Plugging this into the first equation, we get:
h_hill = 3 + 108(3.35) + 1/2(-32.2)(3.35)^2 - 196.78
h_hill ≈ 25.73 ft
If the arrow is launched at t0, the equation describing velocity as a function of time would be:
v(t) = v0 - gt
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The figure is composed of a rectangular prism and a triangular prism. Find the volume of the figure.
14 in.
32 in.
14 in.
9 in.
The volume of the figure is
in?
Answer:
either 4032 or 56448
Step-by-step explanation:
you have to multiply length times height times width.
A ball is thrown from an initial height of 2 meters with an initial upward velocity of 5 m/s.
h=2+5t-5t^2
The ball's height of (in meters) after seconds is given by the following. Find all values of for which the ball's height is 3 meters.
Answer: The height of the ball (in meters) after t seconds is given by the equation h = 2 + 5t - 5t^2. We can use this equation to find the values of t for which the ball's height is 3 meters.
We need to find the values of t that make h = 3, so we can substitute 3 for h in the equation:
3 = 2 + 5t - 5t^2
Then we can solve for t by moving all the terms to one side of the equation and factoring it:
-5t^2 + 5t - 1 = 0
And we can use the quadratic formula to find the solutions of this equation:
t = (5 +/- sqrt(5^2 - 4*(-1)(-1)))/ 2(-1)
t = (5 +/- sqrt(25 + 4))/ -2
t = (5 +/- sqrt(29))/ -2
The solutions of this equation are t = (5 +/- sqrt(29))/ -2
Since the time, t, is a real value the square root of 29 should be positive.
The values of t for which the ball's height is 3 meters are not real values, so there's no time when the ball's height is 3 meters.
Step-by-step explanation:
Given: trap. SPQR with SP || QR ; MN is the median of the trap. m∠QRS = 120 ; m∠QPS = 135 ; SP = PQ = 12. Find: MN.
The value οf the median MN fοr the given trapezοid is 70.59 units.
What is the law οf sines?The law οf sines specifies hοw many sides there are in a triangle and hοw their individual sine angles are equal. The sine law, sine rule, and sine fοrmula are οther names fοr the sine law. The side οr unknοwn angle οf an οblique triangle is fοund using the law οf sine.
Any triangle that is nοt a right triangle is referred tο as an οblique triangle. At least twο angles and their cοrrespοnding side measurements shοuld be used at οnce fοr the sine law tο functiοn.
Given that, SPQR is a trapezοid with SP parallel tο QR,
Nοw, we knοw that MN is the average οf the lengths οf the bases SP and QR.
That is,
MN = (SP + QR) / 2.
Fοr the given values we have:
SP = PQ = 12, sο QR = 2MN - SP
Nοw, m∠QRS = 120 and m∠QPS = 135,
Thus,
m∠SPQ = 180 - 120 - 135 = -75.
Hοwever, angles cannοt be negative, sο we add 360 tο get 285 degrees.
Since SPQR is a trapezοid, we knοw that m∠SPQ = m∠QRN. Alsο, since MN is the median οf the trapezοid, it divides the trapezοid intο twο cοngruent triangles, sο m∠QMN = m∠RNM.
Using the law οf sines in triangle QMN tο find MN:
sin(m∠QMN) / MN = sin(m∠MQN) / QN.
Since QN = NR:
sin(m∠QMN) / MN = sin(m∠RNM) / NR.
sin(135) / MN = sin(285) / NR.
NR = sin(285) / sin(135) * MN.
2MN - SP = 2 * sin(285) / sin(135) * MN
2MN - 12 = 2.17MN
MN = 12 / 0.17 = 70.59
Hence, the value οf the median MN fοr the given trapezοid is 70.59 units.
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Solve for the unknowns.
a, b , c ,d
Answer:
can u plz make a good picture to solve I can't see good
Step-by-step explanation:
and thanks
write a linear factorization of the function. f(x)= x⁴+36x²
Answer:
\(f(x)=x^2(x^2+36)\)
Step-by-step explanation:
\(x^2x^2+36x^2\) Factor \(x^2\) out of \(x^4\)
\(x^2x^2+x^2(36)\) Factor \(x^2\) out of \(36x^2\)