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
Ugo [173]
3 years ago
5

The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a b

ulb is 500 hours. Find the probability of a bulb lasting for between 480 and 526 hours.
Mathematics
1 answer:
FinnZ [79.3K]3 years ago
5 0

Answer:

The probability of a bulb lasting for between 480 and 526 hours=0.74454

Step-by-step explanation:

We are given that

Standard deviation of the lifetime,\sigma=20hours

Mean, \mu=500hours

We have to find the probability of a bulb lasting for between 480 and 526 hours.

P(480

P(480

P(480

P(480

P(480

Hence, the probability of a bulb lasting for between 480 and 526 hours=0.74454

You might be interested in
From an 18-pound cut of meat, Mr. Rand cuts off steaks weighting 1 pound 15 ounces, 3 1/8 pounds, and 4 1/2 pounds. He divides u
Ivanshal [37]

Answer is in the picture

4 0
3 years ago
Read 2 more answers
Financial Literacy Emily spent a total of
frosja888 [35]

Answer:

EASY 10 bec 10/3 take away /3

Step-by-step explanation: HOPE THIS HELPS YOU :)

3 0
3 years ago
A firm produces 19,200 units at a total cost of $67,585.06. Find the cost per unit to the nearest cent.
Mrac [35]
67,585.06 / 19,200 
=3.52

Therefore each unit costs $3.50.
6 0
3 years ago
Read 2 more answers
Identify the zeros of the function f(x) =2x^2 − 2x + 13 using the Quadratic Formula. SHOW WORK PLEASE!! I NEED HELP!!
babunello [35]

Answer:

x=\frac{1+5i} {2}   and  x=\frac{1-5i} {2}

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

f(x)=2x^{2} -2x+13  

Equate the function to zero

2x^{2} -2x+13=0  

so

a=2\\b=-2\\c=13

substitute in the formula

x=\frac{-(-2)\pm\sqrt{-2^{2}-4(2)(13)}} {2(2)}

x=\frac{2\pm\sqrt{-100}} {4}

Remember that

i=\sqrt{-1}

so

x=\frac{2\pm10i} {4}

Simplify

x=\frac{1\pm5i} {2}

therefore

x=\frac{1+5i} {2}   and  x=\frac{1-5i} {2}

7 0
3 years ago
Help ASAP please. question is in the picture.
Georgia [21]
1/2x+6 is your answer.
5 0
3 years ago
Read 2 more answers
Other questions:
  • number from 1 to 99 is written on a card making a pack of 99 cards. What is the probability of randomly selecting a card where t
    12·1 answer
  • How do you subtract a fraction from a Decimal?
    14·1 answer
  • Find the decimal equivalent for the fraction 682/999​
    9·1 answer
  • The band is selling 50 hats for a fundrasier. Each hat is being sold for $12. The hats cost a total of $400. If they sell all th
    10·1 answer
  • Which line is represented by y = 3/2x - 3?
    8·2 answers
  • Biết phép vị tự tâm I biến đường tròn (C):(x-1)^2+(y+1)^2=0 thành đường tròn (C`):(x-2)^2+y^2=4. Tính tổng hoành độ và tung độ c
    12·1 answer
  • Please solve the question attached:
    9·1 answer
  • 5m + 4 = 7m + 6 solve for m
    12·1 answer
  • PLEASE I NEED HELP RN!!!
    10·1 answer
  • If triangle ABC is dilated by a scale factor of 2 with a dilation center of A, what will be the coordinates of point B?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!