A dance studio teaches students a contemporary dance form. it is observed that the probability of students from this studio becoming dance teachers is 0.69. an event management company wants to use this studio for a show. they decide to observe it for a year before making the deal. they enroll 120 students of their own in this studio and decide that once 75 of them get jobs as dance teachers, they will sign the contract with them. what is the probability that the event management company will sign the contract with the dance studio? a. 0.076 b. 0.053 c. 0.024 d. 0.924 e. 0.947
The probability that the event management company will sign the contract with the dance studio is; c. 0.024
How to solve binomial probability?The general formula for binomial Probability is;
P(X = x) = ⁿCₓ * pˣ * (1 - p)⁽ⁿ ⁻ ˣ⁾
From the question, we want to find;
P(X = 75)
where;
Sample size; n = 120 and probability of success; p = 0.69
Thus, we have;
P(X = 75) = ¹²⁰C₇₅ * 0.69⁷⁵ * (1 - 0.69)⁽¹²⁰ ⁻ ⁷⁵⁾
P(X = 75) = 0.024
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What is the perimeter of the triangle?
units
Answer:
36 units
Step-by-step explanation:
Break it into 2 right triangles with legs 6 and 8 then the hypot = 10
8 +8 + 10 + 10 =36
The interior of a building is in the form of cylinder of diameter 10m and height 8m, surmounted by a cone whose vertical angle is a right angle.
Then what will be the area of the surface and the volume of the building?
Answer:
Surface Area = 399.4 m²Volume = 1675.5 m³Step-by-step explanation:
Lateral Surface Area of the Cylindrical Part
2πrh2 x π x 5 x 880 x π251.3 m²Slant height of cone
√r² + h²√25 + 64√899.43 mSurface Area of Conical Portion
πrlπ x 5 x 9.4347.15 x π148.1 m²Total Surface Area :
251.3 + 148.1399.4 m²Volume
V = πr²h + 1/3πr²hV = πr²h (1 + 1/3)V = π x 25 x 8 x (4/3)V = π x 1600/3V = 1675.5 m³Hope it helps.
If you have any query, feel free to ask.
I don't understand how to do this section of this worksheet. Can someone help me understand how to get the answer? I have a test tomorrow and I can't fail it.
Answer:
see explanation
Step-by-step explanation:
There are 4 sections on the spinner so each option is 1/4
1) 4 Ds = 1/4 × 1/4 × 1/4 × 1/4 × 3/4 × 3/4 = 9/4096
the other two spins can be A, B, or C (3/4)
2) 2As = 1/4 × 1/4 × 3/4 × 3/4 × 3/4 × 3/4
the other two spins can be B, C, or D (3/4)
3) 2As = 1/4 × 1/4 = 1/16 OR means add
3Bs = 1/4 × 1/4 × 1/4 = 1/64
1/16 + 1/64 = 5/64
4) at least 4 Cs = 1/4 × 1/4 × 1/4 × 1/4 =1/256
A softball has a volume of 125/6 pie cubic inches. Find the radius of the softball
The radius of the softball is 2.5 inches
The volume of a sphere is given by
V = 4/3 pi r^3
We know the volume is 125/6 pi
Substituting in
125/6 pi = 4/3 pi r^3
Divide by pi on each side
125/6 pi/ pi = 4/3 pi/ pi r^3
125/6 = 4/3 r^3
Multiply by 3/4 on each side to isolate r
125/6 * 3/4 = 3/4 *4/3 r^3
125/8 = r^3
Take the cube root on each side
(125/8) ^ 1/3 = (r^3) ^ 1/3
5/2 = r
2.5 =r
The radius of the softball is 2.5 inches
Answer:
[tex]\huge\boxed{\sf r = 2.5 \ in.}[/tex]
Step-by-step explanation:
[tex]\sf Volume \ of \ sphere = \frac{4}{3} \pi r^3\\\\Where \ volume = \frac{125 \pi }{6 } \ in.^3\\\\Put \ in \ the \ above\ formula:\\\\\frac{125 \pi}{6} = \frac{4}{3} \pi r^3\\\\Cancel \ pi\\\\\frac{125}{6} = \frac{4}{3} r^3\\\\20.83 = 1.33 r^3\\\\Divide \ 1.33 \ to \ both \ sides\\\\20.83/1.33 = r^3\\\\15.625 =r^3\\\\Take \ cube \ root \ on \ both \ sides\\\\\sqrt[3]{15.625} = \sqrt[3]{r} \\\\2.5 = r\\\\[/tex]
[tex]\sf r = 2.5 \ in.\\\\\rule[225]{225}{2}[/tex]
HELP PLEASE!!
Lowes sold garden gnomes for $28. 99 each a customer signed up for a free membership card and received a 5% discount off the price. Sales tax of 5% was applied after the discount what was the final price of the garden gnome
Answer:
$28.92
Step-by-step explanation:
Find the discount
28.99 × 0.05 = 1.4495
28.99-1.4495 = 27.5405
Calculate the tax of the discounted item
27.5405 x 0.05 = 1.377
27.5405 + 1.377 = 28.9175
Tonja is a married taxpayer who claims 2 withholding allowances. She earns
$600 per week, and pays $150 per week in childcare expenses. How much will
she save in federal income and FICA taxes if she has her childcare expenses
deducted from her check before taxes?
The amount that Tonja will save in Federal Income and FICA Taxes if she has her childcare expenses deducted from her check before taxes is: $26.17
What is Federal Income Tax?Federal Income Tax is a tax that is levied by the Federal Government and most states in the United States of America. It comprises of 7 tax rates.
What is FICA Tax?FICA Tax is a Federal Insurance Contributions Act Tax. This tax is levied on every payroll of employees to fund Social Security and Medicare programs. This is divided into two parts:
How to calculate Tonja's Tax before deduction
Federal Tax rate first level is 10% on 0$ - $19,900.
1) Hence, the first tax is 10% on $600, which is $60
2) The next tax is FICA. This is applied to the Gross Pay of $600.
Applying both taxed under FICA we have 7.65% * $600 = $45.9
Total Tax before a deduction is:
$60 + $45.9 = $105.6
The Tax Payable if childcare expenses is deducted first will be:
10% on $450 = $45
7.65% on $450 = $34.43
Total = $79.43
Hence the tax savings will be:
105.6 - 79.43 = $26.17
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100 points brainliest help asap
1 choice- left or right
2 choice- mean or median
3 choice- iqr or range the iqr
PICK ONE FROM EACH CHOICE
Answer: (not sure)
right
median
range the iqr
What is the value of y in the relative frequency table? round the answer to the nearest percent. 12% 27% 46% 52%
The relative frequency table is a two way table, and the value of y in the relative frequency table is 27%
How to determine the value of y?From the complete question, we have the following row
y 24% 51%
Express the row as an equation
y + 24% = 51%
Subtract 24% from both sides
y + 24% - 24%= 51% - 24%
Evaluate the difference
y = 27%
Hence, the value of y in the relative frequency table is 27%
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(x-2y)^5 using pascal triangle
Step-by-step explanation:
I edit this on computer, because I have class later
Scientific knowledge allows new technologies to be built, and those technologies, in turn, impact society at many levels.
options:
True
False
Answer:
true
Step-by-step explanation:
How do I draw the circle correctly to solve the problem?
Answer:
2/4NStep-by-step explanation:
I don't know if it's correct
Please help<3 due in 30 mins !!!!!!!!
Answer and Explanation:
Sara's sample is biased, she's only taking people that naturally would pull out their phones as they are waiting for a bus to arrive.
Sara's claim is not valid, the sample is too small and biased to be applied to her whole town.
Sarah saves $1. 5 daily while jessica saves $1 more than sarah each day. Although jessica started saving 10 days later than sarah she has now saved $12 more than sarah. How many days has sarah been saving?
A school has 320 students.
9 students in every 16 speak English
How many students speak English?
Answer:
180 students speak English
Step-by-step explanation:
320÷16=20
20×9=180
Solve using order of operation 2y+7= negative 7
Answer:
y = -7
Step-by-step explanation:
2y + 7 = -7
Subtract 7 from both sides.
2y + 7 - 7 = -7 - 7
2y = -14
Divide both sides by 2.
2y/2 = -14/2
y = -7
True or False
A solution to 8 = -x + 10 is 2
Answer:
[tex]\huge\underline{Answer - }[/tex]
[tex]\bold{8 = - x + 10} \\ \\ \bold{\implies \: - x = 8 - 10} \\ \\ \bold{\implies \: \cancel - x = \cancel - 2 }\\ \\ \bold{\implies x\: = 2}[/tex]
hence , the given statement is true !
hope helpful ~
Answer:
TrueStep-by-step explanation:
So, Lets find out if the solution is true or not, So first let us find the value of x.
⇒ 8 = -x + 10
We can rewrite the equation as,
⇒ -x + 10 = 8
Subtracting 10 from both sides we get :
⇒ -x + 10 – 10 = 8 – 10
⇒ -x = -2
Multiplying both sides by (-1) :
⇒ -1(-x) = -1(-2)
⇒ x = 2
Therefore,
The statement "A solution to 8 = -x + 10 is 2" is trueSolve this quadratic equation using the quadratic formula.
3x 2 + 5x + 1 = 0
Solution
x=\frac{-5 \pm \sqrt{13}}{6}
Please help!! Will mark brainlyest.
Answer:
(-7,-3)
Step-by-step explanation:
explained in graph :)
For the polyhedron, use Euler's Formula to find the missing number.
faces:
edges: 14
vertices: 9
The number of faces is
If the number of the edges of the polyhedron is 14 and the vertices are 9. Then the number of the faces of the polyhedron is 7.
What is a polyhedron?A polyhedron is a solid made composed of polygons in three dimensions. It has vertices, flat faces, and straight edges.
We know the Euler's formula
F + V - E = 2,
where, F = number of faces, V = number of vertices, and E = number of edges
Edges: 14
Vertices: 9
F + 9 - 14 = 2
F = 14 + 2 - 9
F = 16 - 9
F = 7
Then the number of the faces of the polyhedron is 7.
More about the polyhedron link is given below.
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please help me !!!!!!!!
Answer:
the fourth option
Step-by-step explanation:
due to the range and median the range is 4 to 17 and the median is 10
Write the quadratic equation in factored form. Be sure to write the entire equation.
x 2 + x - 12 = 0
Answer: It should be this exactly: (x+4)(x-3)=0
Step-by-step explanation:
You wish to compute the 95% confidence interval for the population proportion. How large a sample should you draw to ensure that the sample proportion does not deviate from the population proportion by more than 0.06
Answer:
take 95% and 0.06 and find what is half of 95 and then multiply that by 95 and then put it in a fraction. amd circle your final answer
Which graph represents 3x - 2y > 4?
Answer:
It should somewhat look like the graph below...
Hope it helps!
HELP WILL MARK BRAINLIEST
EXTRA POINTS
Answer:
Step-by-step explanation:
7x+103=180
180-103=77
77=7x
77/7=x x=11
<W: 55-23=32
<v: 58
<x:90
Which block has a volume of 90 cm3?
Answer:
The volume of c. figure is equal to 90 cm³
Step-by-step explanation:
These are the cuboids
The volume of a cuboid = l×b×h
A. 2×6×5
=> 60 cm³
B. 8×2×4
=> 64 cm³
C. 5×6×3
=> 90 cm³
D. 3×7×2
=> 42 cm ³
so, the volume of c. cuboid is equal to 90 cm ³
Simplify the expression:
10x+10x2+2x
Answer:
[tex]10x + 10x^{2} + 2x\\= 10x + 2x + 10x^{2}\\= 12x + 10x^{2}\\= \boxed{2x(6 + 5x)}[/tex]
Given Expression,
10x + 10x² + 2xWe can also write it as,
10x² + 10x + 2xNow, Combining the like terms,
The like terms are 10x and 2x so,10x² + 12xWe simplified the expression.
If you want it to factorise it,
⇒10x² + 12x
⇒ 2x(5x + 6)
This is required factorised expression
what is the y-value of the solution to the system of equations shown below? 5x+4y=12 -5x-2y=-16
A. -4
B. -2
C. 2
D. 4
Answer:
B. -2
Step-by-step explanation:
what is the area if the length is 12 in. and the width is 2 in.
Answer:
A = 24
Step-by-step explanation:
L * w = A
12 * 2 = 24
A = 24
A small tank has a cylindrical shape. It has a radius of 15 inches and a height of 48 inches. A can of spray paint will cover 720 square inches. How many cans of paint must be bought to completely cover the tank with one coat of paint?
HELP FAST WILL GIVE LOTS OF POINTS
Answer:
c) 9
Step-by-step explanation:
[tex]\textsf{Surface area of a cylinder}=2\pi r^2+2\pi rh[/tex]
(where r is the radius and h is the height)
Given:
r = 15 inh = 48 inSubstitute given values into the equation to find the surface area:
[tex]\begin{aligned}\implies \textsf{Surface area} & =2\pi (15)^2+2\pi (15)(48)\\ & =1890 \pi\: \sf in^2\end{aligned}[/tex]
To calculate the number of cans of paint to be bought, divide the surface area by the area one can of paint will cover:
[tex]\implies \dfrac{1890 \pi}{720}=8.246680716...[/tex]
We need to round this number up, as rounding down will mean we will not have quite enough paint to cover the surface area of the cylinder.
Therefore, the numnber of cans of paint that must be bought to completely cover the tank with one coat of paint is 9.