Answer:
D No; even though there is a strong positive correlation, playing violin doesn't cause students to get better grades
A business student is interested in estimating the 90% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within seven percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available
Answer:
n = 106
Step-by-step explanation:
Given
p = 0.5 and 1-p = q = 0.5
Margin of error = 0.08
Confidence level = 90%
Z score for 90% confidence level = 1.65
As we know -
Margin of error = z * Sqrt (pq/n)
Substituting the given value, we get –
0.08 = 1.65 * Sqrt (0.5*0.5/n)
Squaring both the sides and solving, we get
n = 1.65^2*0.5^2/0.08^2
n = 106.34 = 106
if gh¢400.00 is deposited at a bank at 10% per annum compounded quarterly, how long will it take the deposit to double it value.
9514 1404 393
Answer:
7 years
Step-by-step explanation:
The multiplier each quarter is 1 +10%/4 = 1.025. The number of quarters, n, that must pass before the value is multiplied by 2 is given by ...
1.025^n = 2
Taking logarithms, we can solve for n:
n×log(1.025) = log(2)
n = log(2)/log(1.025) ≈ 28.071
It will take 28 quarters, or 7 years, for the value to double.
There are 10 students in a class. The teacher chooses 3 students to go to the
library. The order in which they are chosen does not matter. How many ways
are there to choose the students?
A. 100
B. 90
C. 720
D. 120
Answer:
D
Step-by-step explanation:
Since the order does not matter, then it is a combination question,
So you just use the combination technique,
10C3 = 10!/(10!(10-3)!) = 120 ways
Answer: 120
Step-by-step explanation:
i just took the quiz
AT YOUR NEW JOB AT THE COFFEE
SHOP, YOU SOLD 42 LARGE
COFFEES AND 54 SMALL COFFEES.
WHAT WAS THE RATIO OF LARGE
TO SMALL COFFEES YOU SOLD?
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Answer:
7 : 9
Step-by-step explanation:
The ratio of interest is ...
large coffees : small coffees = 42 : 54 = 7 : 9
Rewrite the polynomial in the form ax^2 + bx + C and then identify the values of a, b, and c.
I really need help ):
Answer:
[tex]a = 5\\\\b = -1\\\\c=1[/tex]
Step-by-step explanation:
Given
[tex]-x+5x^2+1[/tex]
Required
Rewrite and identify a, b and c
The required form is:
[tex]ax^2 + bx + c[/tex]
Equate both expressions
[tex]ax^2 + bx + c = -x+5x^2+1[/tex]
Rewrite as:
[tex]ax^2 + bx + c = 5x^2-x+1[/tex]
Compare the expressions on either sides
[tex]a = 5\\\\b = -1\\\\c=1[/tex]
What complex number is represented by the expression 7i5 + 9i8?
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Answer:
9 +7i
Step-by-step explanation:
i^2 = -1, so i^8 = (-1)^4 = 1, and i^5 = (-1)^2×i = i
Then ...
7i^5 +9i^8 = 7i +9 = 9 +7i
If you are multiplying by the vertical method as seen below, what is the value of C?
QUICK QUESTION!
Answer:
option 1
Step-by-step explanation:
[tex]x^2[/tex] [tex]-2x[/tex] [tex]+8[/tex]
[tex]x[/tex] [tex]-4[/tex]
_____________________
[tex]-4x^2[/tex] +8x -32
[tex]x^3[/tex] [tex]-2x^2[/tex] +8x 0
_______________________
[tex]x^3[/tex] [tex]-6x^2[/tex] +16x -32
[tex]A =+ 8x\\\\B = -2x^2\\\\C= +16x[/tex]
Helppppppp! 15 points!
[tex]{\boxed{\mathcal{\purple{D.\:81}}}}[/tex] ✅
[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\orange{:}}}}}[/tex]
[tex]( {3})^{ \frac{11}{5} } \div {3}^{ \frac{ - 9}{5} } \\ \\=( {3})^{ \frac{11}{5} - ( \frac{ - 9}{5} ) } \\ \\ = ( {3})^{ \frac{11}{5} + \frac{9}{5} } \\ \\ = ( {3})^{ \frac{11 + 9}{5} } \\ \\ = ( {3})^{ \frac{20}{5} } \\ \\ = ( {3})^{4} \\ \\ = ( \: 3 \times 3 \times 3 \times 3 \: ) \\ \\ = 81[/tex]
Note:-
[tex] {a}^{m} \div {a}^{n} = {a}^{m - n} [/tex]
[tex]\sf\red{(-)\:x\:(-)\:=\:+}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]
Which statement describes the graph?
Answer:
A
Step-by-step explanation:
The answer is A, the graph raises, crosses at (0, 5) and then remains constant.
Suppose one relatively large value is added to a set of all relatively small data values. Which of the following measures would not be affected (i.e. 10 12 16 12 150 13 - which average technique would not be impacted by the outlier)?
A. the mode.
B. the standard deviation.
C. the range.
D. the mean.
Answer:
A. the mode.
Step-by-step explanation:
Mean
Sum of all values divided by the number of values, so is affected by an outlier present in the data-set.
Standard deviation:
Square root of the sum of the differences squared between each value and the mean, divided by the sample size. As it's related to the mean, it is affected by an outlier.
Range:
Subtraction of the largest value of the data-set by the smallest value, and thus, is also affected by an outlier.
Mode
Value that appears the most often in the data-set, and thus, not affected by an outlier, which means that the correct answer is given by option A.
You buy items costing $1900 and finance the cost with a fixed installment loan for 24 months at 8% simple interest per year.
1. What is the finance charge?
2. What is your monthly payment?
* Please explain how you got the answer*
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Answer:
$304$91.83Step-by-step explanation:
1. The finance charge is found from the simple interest formula;
I = Prt
where P is the principal amount, r is the annual rate, and t is the number of years.
24 months is 2 years, so the interest charged is ...
I = $1900×0.08×2 = $304
The finance charge is $304.
__
2. The monthly payment will be the total amount due, divided by the number of months.
payment = ($1900 +304)/24 = $2204/24 ≈ $91.83
The monthly payment is $91.83.
can someone help me please?! I'll give brainlest for correct answer
Answer:
MBE, REU, XBy, XEW, BER is an acute angle
WRU, RUm, XBM is an obtuse angle
RU, XE, Mm, ME, MU, WE, XB, MB, My is a straight angle
BM, BE, BX, By is an angle of vertex B.
I don’t know (for e)
BER: REB
I don’t know (for g)
EBy and XBM are two supplementary angles.
Step-by-step explanation:
I need help solving for x
Answer:
[tex]x=63.0^o[/tex]
Step-by-step explanation:
Given
[tex]RS = 35[/tex]
[tex]RT = 77[/tex]
The attached triangle
Required
Solve for x
The relationship between x, RS and RT is:
[tex]\cos(x) = \frac{RS}{RT}[/tex]
This gives:
[tex]\cos(x) = \frac{35}{77}[/tex]
[tex]\cos(x) = 0.4545[/tex]
Take arc cos of both sides:
[tex]x = \cos^{-1}(0.4545)[/tex]
[tex]x=63.0^o[/tex] --- approximated
Solve the following equation for x: 2x – 3y = 6.
Ox = y + 3
Ox=y-3
3
2
Ox= -2y-3
2
Ox= -x + 3
Answer:
the answer is A
x=3/2y+3
Step-by-step explanation:
2x=6+3y
x=3+3/2y
x=3/2y+3 is the solution of the equation 2x-3y=6.
The given equation is 2x-3y=6
We need to solve for variable x in the equation.
Isolate the term with variable x.
Add 3y on both sides of the equation.
2x=6+3y
Now divide both sides by 2
x=3+3/2y
x is the solution of the equation.
x=3/2y+3
To learn more on Equation:
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True or False It is never sensible to calculate more than 100% of a number.
Answer:
False
Hope this helps!
PLZ HELP ASAP !!!!!!
Answer:
c there you go hi your welcome
how many liters are there in 11.23 kiloliters?
A. 11.23
B. 112.30
C. 1123
D. 11,230
Answer:
D.11,230
Step-by-step explanation:
11.23 = 1 KILOLITER = 1000 LITERS
11.23*1000
11230
The value of p(x) = 5x− 4x + 3 for x = −1 is ________.
Answer:
Step-by-step explanation:
p(-1)=5*-1 -4*-1 +3
=-5-(-4) +3
=-5+4 +3
=-5+7
=2
Answer:
2
Step-by-step explanation:
p(-1)= 5(-1)-4(-1)+3
p(-1)= -5+4+3
p(-1)= 2
suppose a charity received a donation of $26.2 million. if this represents 49% of the charity's donated funds, what is the total amount of its donated funds? round your answer to the nearest million
Answer:
53 million.
Step-by-step explanation:
$26.2 / total = 0.49 ($ in millions)
Then total = (26.2) ÷ 0.49 = 53.47 millions which we can round up to 53 million $
Solve for x for this triangle (geometry)
Answer:
[tex]x=60^{\circ}[/tex]
Step-by-step explanation:
The are 180 degrees in a triangle and 180 degrees on a line. Therefore, call the third angle of the triangle [tex]y[/tex].
The following equation solves for [tex]y[/tex]:
[tex]y+119=180,\\y=61^{\circ}[/tex]
Solving for [tex]x[/tex]:
[tex]x+59+61=180,\\x=\boxed{60^{\circ}}[/tex]
Identify the cavity that develops entirely from the mesoderm.
PLEASE HELPP!!
f(x) = 3x2 + 5x – 2
g(x) = 5x3 – 4x2 + 4
Find (f +g)(2)
O A. (f +g)(x) = 5x + 3x2 + x + 2
B. (f +g)(x) = 8x3 + x + 2
O c. (f +g)(x) = 523 – 2? + 5x + 2
O D. (f +g)(x) = -52% + 7x2 + 5x – 6
Answer:
C. (f+g)(x) = 5x^3 - x^2 + 5x + 2
Step-by-step explanation:
Combine like terms:
5x^3 + 0 = 5x^3
-4x^2 + 3x^2 = -x^2
5x + 0 = 5x
4 - 2 = 2
5x^3 - x^2 + 5x + 2
HELP. Been wasting points because of trolls.
If another troll appears then I dont know npw maybe just end this sh t and I dont have friends too so I cant copy from anyone.
Answer:
A = 26.6°
Step-by-step explanation:
To obtain the measure of angle A :
We use the trigonometric relation :
Tan A = opposite / Adjacent
Tan A = 6 / 12
Tan A = 1/2
A = tan^-1(1/2)
A = 26.565°
A = 26.6°
Becky created a graph to represent her distance away from home one afternoon. She left home and ran to the park, met some friends and stayed at the park, and then walked back home using the same route. Which graph could Becky have created?
Answer:
probably linear graph 'cause it's in a straight line
Answer:
Step-by-step explanation:
First graph is correct which satisfies the given informations.
The graph is attached below.
Given:
Becky made a graph to show how far she was from her house.
She started jogging from zero distance from the house when she left and sprinted to the park, so the second and fourth graphs are incorrect.
She then spent some time at the park with some friends before returning home on the same path. The first one is accurate since we can see that for a brief while, the graph is parallel to the time axis, but the third one demonstrates that she hasn't taken a break.
Learn more about distance here:
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What are the coordinates of point (6,-2) after D o, 1/2
Explanation: Cut each coordinate in half.
In other words, multiply each coordinate by 1/2 = 0.5
6*0.5 = 3
-2*0.5 = -1
The point (6,-2) moves to (3, -1) after the dilation. This trick only works because the origin is the center of dilation.
Select all the numbers that are solutions to the inequality 4,5,,6>5,5.2>5,5.01>5,0.5
Plzzz answer I’ll give you 10 points
iii; iv; and v
Step-by-step explanation:
I think
(a)
There are 33 liters of orange juice at a school party. 1010 students want to drink all of the orange juice, and they all want to get exactly the same amount. How much orange juice can each get?
___liters
Enter your answer as a fraction or a mixed number.
(b)
Write a number sentence that represents the problem.
___________ = __________
In the first box write an equation like 1+11+11+1 . In the second box, write your answer.
PLS DON'T FOR GET TO DO PART B TOO I AM BEGING YOU!
Answer:
a) 30.60
b) 1010/33 = 30.60
Step-by-step explanation:
Help ASAP 100 PTS!!!!
Describe how to determine the average rate of change between x = 1 and x = 3 for the function f(x) = 3x3 + 1. Include the average rate of change in your answer. Please show all work and explain it thourougly.
Answer:
39
Step-by-step explanation:
Find the value of f(x) at both points
f(3) = 3(3)³ + 1 = 82
f(1) = 3(1)³ + 1 = 4
---------------------------
Average Rate of Change is just like slope
Divide the change in f(x) by the change in x
r = (82 - 4) / (3 - 1)
r = 78/2
r = 39
3a. The distance around a circular track.
Circumference
Area
Answer:
Circumference
Step-by-step explanation:
The Circumference is the the distance around a circular region, it could be imagined as the distance covered by running or walking around the track of a circular athletic stadium. The Area in the other hand is used to describe the entire region enclosed within the circle. For instance the area may be described as the entire pitch region of an athletic stadium, if the circular distance is the Circumference, the enclosed region within the circle is the measure of the Area.
5+x^2-7x in standard form