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
Nitella [24]
3 years ago
10

A flashlight battery manufacturer makes a model of battery whose mean shelf life is three years and four months, with a standard

deviation of three months. The distribution is approximately normal. One production run of batteries in the factory was 25,000 batteries. How many of those batteries can be expected to last between three years and one month and three years and seven months?
Mathematics
1 answer:
telo118 [61]3 years ago
3 0

Answer:

17000 batteries

Step-by-step explanation:

Three years and one month is equivalent to the mean minus one standard deviation.

Three years and seven months is equivalent to the mean plus one standard deviation.

For a normal distribution, we know that 68% of population is between mean ± 1 sd, then can be expected that 25000*68% = 17000 of batteries last between three years and one month and three years and seven months

You might be interested in
Determine whether the given function is a solution to the given differential equation. y=cosx+x8​, d^2y/dx^2 + y = x^8 + 56x^6.
Ulleksa [173]

The correct question is:

Determine whether the given function is a solution to the given differential equation. y = cosx + x^8; d²y/dx² + y = x^8 + 56x^6

Step-by-step explanation:

Given the differential equation

d²y/dx² + y = x^8 + 56x^6.

Suppose y = cosx + x^8 is a solution, then differentiating y twice, and adding it to itself, must give the value on the right hand side of the differential equation.

Let us differentiate y twice

y = cosx + x^8

dy/dx = -sinx + 8x^7

d²y/dx² = -cosx + 56x^6

Now,

d²y/dx² + y = -cosx + 56x^6 + cosx + x^8

= 56x^6 + x^8

Therefore,

d²y/dx² + y = x^8 + 56x^6

Which shows that y = cosx + x^8 is a solution to the differential equation.

4 0
3 years ago
Hey I'll give you a brainliest if you get the right answer for me :)
ale4655 [162]
Yes the answer is c. z=3 or z=-9
3 0
3 years ago
Max and pedro both clean pools. Each charges a flat fee to clean a pool. Max cleans 12 pools in 8 hours and earned $270. Pedro c
marshall27 [118]

Answer:

The number of pools clean per hour is 1.5

Step-by-step explanation:

Given as :

The number of pools clean in 8 hours = 12

The number of pools clean in 7.5 hours = 9

Let The number of pools they clean per hours = x

I.e x = \frac{8}{12} +  \frac{7.5}{9}

Or, x =  \frac{24+30}{36}

Or, x =  \frac{54}{36}

∴   x =  \frac{3}{2}

I.e x = 1.5

Hence The number of pools clean per hour is 1.5 Answer

3 0
3 years ago
Kim and her 5 friends hiked over a three day weekend hey hiked the same distance each day how many miles did they hike per day?
weeeeeb [17]
Honestly, this would depend how many miles they hiked all together. then you divide it by 3. Until you have the total amount, you don't get a correct answer. 
7 0
3 years ago
Which of the following statements correctly compares the rate of change for the money payed, measured as
Licemer1 [7]
C I am sorry if I am wrong
7 0
2 years ago
Read 2 more answers
Other questions:
  • What is the volume of a rectangular crate that has dimensions 8 inches by 8 inches by 1 1/4 feet? 80 in.3 1,024 in.3 960 in.3 31
    5·1 answer
  • Given f(x) = 3x + 4 and g(x) = 8x + 1<br> then what is ( f + g )(0))?
    13·1 answer
  • What is the equivalent radical expression for the exponential expression below? 71/2
    12·1 answer
  • 15 POINTS !!!!! 9-7 3/5 = ______?(Show step by step )
    8·1 answer
  • It is common in many industrial areas to use a filling machine to fill boxes full of product. This occurs in the food industry a
    12·1 answer
  • Write these as a single term.<br> 6a x 6b =
    8·2 answers
  • In an experiment focused on meditation and anxiety, participants are assigned to either meditate for 5 minutes or sit in silence
    6·1 answer
  • Definition of volume in math?<br><br><br><br><br> Read comment under this question plz
    12·2 answers
  • The price of a new toy is $28. During the first week, the number of toys sold at a local store is tracked. What are the total sa
    8·2 answers
  • If 2x + y = 23 and 4x – y = 19; find the value of x – 3y and 5y – 2x
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!