1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
masha68 [24]
3 years ago
5

Si el gerente de control de calidad desea estimar la media de vida de lámparas con 20 horas, con un nivel de confianza del 95% y

se supone un error de 10%. ¿Cuál es el tamaño de la muestra?
Mathematics
1 answer:
vfiekz [6]3 years ago
6 0

English translation:

If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?

You might be interested in
Find the area of the trapazoid for me please :)
Doss [256]

Answer:

A = 14 m^2

Step-by-step explanation:

The area of a trapezoid is found by

A = 1/2 (b1+b2) *h  where b is the length of the bases and h is the height

A = 1/2 (2+5) *4

A = 1/2(7)4

A = 14 m^2

6 0
3 years ago
The cost of a video game can be modeled by the question C=5x-2. The number of games sold can be modeled by the equation N=8x+5.
insens350 [35]
5x - 2 = 8x + 5.
-2 = -5x + 8x + 5
-2 = 3x +5
-7 = 3x

-7/3 = -2.3
4 0
3 years ago
Work out x most dedicated not rushed gets brainiest
Softa [21]

Answer:54

Step-by-step explanation:

Pentagon has 5 sides

n=5

Sum of interior angles=180(n-2)

Sum of interior angles=180(5-2)

Sum of interior angles=180x3

Sum of interior angles=540

Size of each interior angle =540/n

Size of each interior angle =540/5

Size of each interior angle=108

x=108/2

x=54

6 0
3 years ago
Y=arccos(1/x)<br><br> Please help me do them all! I don’t know derivatives :(
Stells [14]

Answer:

f(x) =  {sec}^{ - 1} x \\ let \: y = {sec}^{ - 1} x  \rightarrow \: x = sec \: y\\  \frac{dx}{dx}  =  \frac{d(sec \: y)}{dx}  \\ 1 = \frac{d(sec \: y)}{dx} \times  \frac{dy}{dy}  \\ 1 = \frac{d(sec \: y)}{dy} \times  \frac{dy}{dx}  \\1 = tan \: y.sec \: y. \frac{dy}{dx}  \\ \frac{dy}{dx} =  \frac{1}{tan \: y.sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ \sqrt{( {sec}^{2}   \: y - 1}) .sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\   \therefore  \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\ \frac{d( {sec}^{ - 1}5x) }{dx}  =  \frac{1}{ |5x |  \sqrt{25 {x }^{2}  - 1} }\\\\y=arccos(\frac{1}{x})\Rightarrow cosy=\frac{1}{x}\\x=secy\Rightarrow y=arcsecx\\\therefore \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} }

4 0
2 years ago
What is the length of line AB in the given triangle?<br> A.) 8<br> B.)8.3<br> C.)6.6<br> D.)9.7
Andrew [12]

i think it is c or b
7 0
3 years ago
Other questions:
  • Which polynomials are in standard form
    10·1 answer
  • What is the distance between a given point on a parabola and the parabolas Focus if the distance between the given point and the
    6·1 answer
  • !!!!!1ILL GIVE 25 POINTS AND BRAINLIEST JUST PLEASE B((((((((((((((!!!!!
    6·2 answers
  • Combine like terms.
    5·1 answer
  • Daniel Trumpe has computed the EOQ for a product he sells to be 400 units. However, due to recent events he has a cash flow prob
    6·1 answer
  • PLEASEE answer correctly !!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!
    6·2 answers
  • Can you guys please help me I’ll give me a star
    10·2 answers
  • I will give brainliest pls help
    12·1 answer
  • Does amyone know the answer ??​
    12·1 answer
  • There are 180 students in the seventh grade, and 25% are in the Environmental Club. How many students are in the Environmental C
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!