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
Brut [27]
2 years ago
13

A physical fitness association is including the mile run in its secondary- school fitness test. the time for this event for boys

in secondary is known to process a normal distribution with a mean of 440 seconds and a standard deviation of 40 seconds. Find the probability that a randomly selected boy in school can run the mile in less than 348 seconds
Mathematics
2 answers:
liberstina [14]2 years ago
4 0

Answer:

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

μ of the time a group of boys run the mile in its secondary- school fitness test  = 440 seconds

σ of the time a group of boys run the mile in its secondary- school fitness test = 40 seconds

2. Find the probability that a randomly selected boy in school can run the mile in less than 348 seconds.

Let's find out the z-score, this way:

z-score = (348 - 440)/40

z-score = -92/40 = -2.3

Now let's find out the probability of z-score = -2.3, using the table:

p (-2.3) = 0.0107

p (-2.3) = 0.0107 * 100

p (-2.3) = 1.1% (rounding to the next tenth)

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

Paraphin [41]2 years ago
4 0

Answer:

0.0107

Step-by-step explanation:

z = (348 - 440)/40 = -2.3

1 - 0.9893

= 0.0107

You might be interested in
How many solutions does this system
mr Goodwill [35]
The answer is B.) one




Hope this helps :)
5 0
3 years ago
The circumference of the base of a cylinder is 24π mm. A similar cylinder has a base with circumference of 60π mm. The lateral a
earnstyle [38]
Given that the figures are similar polygons, the ratio of their ratios should be equal to the square of the ratio of their circumference. If we let x be the lateral area of the smaller cylinder then,
                        (x/210π) = (24π/60π)²
The value of x from the equation is, 
                                     x = 33.6π
Thus, the area of the smaller cylinder is equal to 33.6π mm². 
6 0
3 years ago
Read 2 more answers
If a line goes through the point (8,9) and has a slope of negative 3/4 what is the starting value?
scZoUnD [109]

I assume by starting value, you mean y-intercept. The y-intercept is 15

To find this, we need to use slope intercept form and the given information to find it.

y = mx + b ----> plug in the known values

9 = -3/4(8) + b

9 = -6 + b

15 = b

Therefore, the starting value is 15.

5 0
3 years ago
If x Is a real number such that x3 = 64, the x2 + x equals what?
Annette [7]

Answer:

20

Step-by-step explanation:

Assuming that the equation is x³ = 64, that can be solved by putting cube root on both sides like so: ∛(x³) = ∛64, which simplifies to <em>x = 4</em>.

Plugging that into our expression gives us <em>4² + 4</em>, which is 20.

7 0
3 years ago
Their are 5280 feet in 1 mile. How many inches are there in 4 miles
schepotkina [342]

Answer:

21120

Step-by-step explanation:Because you take 5280 and multiply it by 4

7 0
3 years ago
Other questions:
  • Partial products 42x5
    9·2 answers
  • Let 3.27&lt;&lt;5.89 represent an interval on the number line. Find the value that is in the middle of the interval.
    12·1 answer
  • What is the horizontal asymptote of the function f(x)=(x-2)/(x-3)^2
    14·2 answers
  • PLEASE HELP ME!!! ILL GIVE BRAINLIEST!!!
    14·2 answers
  • 7p +11 - 31 stuck at this one​
    11·1 answer
  • Division problem help pls
    6·1 answer
  • Find the perimeter and area of a rectangle with a width of 2 feet and a length 3 times as long.
    9·2 answers
  • 12y = 8x + 29 write in slope intercept form and what is the solution? Show all your work plz help!
    5·1 answer
  • What is the answer, I need this for a geometry assignment.
    11·1 answer
  • Todd is 33 years old; his nephew Jacob is 12. In how many years will Jacob be ½ his uncle Todd's age?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!