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
oee [108]
3 years ago
8

to qualify as a contestant in a race, a runner has to be in the top 16% of all entrants. The running times are normally distribu

ted, with a mean of 63 min and a standard deviation of 4 min. To the nearest minute, what is the qualifying time for the race
Mathematics
1 answer:
Komok [63]3 years ago
7 0

Find P(z)=16% where z =(t-63)/4

And from the Normal Distribution tables you find that a left tail of 16% implies z=-0,9945 then:

t=-4 x 0.9945 + 63=59.22 and the solution would be 59 minutes

You might be interested in
The minimum size of a photo book ordered through a website is 6 pages. The website charges $1.70 per page for the first 6 pages.
m_a_m_a [10]
Well Okay, 1.70 x 6 + .90x, Your pretty much taking 1.70 multiply by 6 then adding .90 for every page after.
6 0
3 years ago
On her way to visit her parents, jeniffer drives 265 miles in 5 hours. what is her average rate of speed in miles per hour?
poizon [28]
53 miles per hour because 265 divided 5 is 53.
3 0
2 years ago
You have 12 coins, one of which is fake. The fake coin is indistinguishable from the rest except that it is heavier. Can you det
Anton [14]
Yep! 
Weighing #1: Start off by splitting the pile of 12 coins evenly into two piles, 6 in each pile. Put one pile on each side of the balance. The side that is weighed down has the fake coin it in. Ignore the other 6 coins.

Weighing #2: Now you have 6 coins left. Split the pile evenly again, 3 in each pile. Repeat the same process and put each pile on one side of the balance. The side that is weighed down has your fake coin in it. Ignore the other 3 coins.

Weighing #3: You have 3 coins left. Take two coins, whichever two you like, and weigh them. If they weigh the same, then the one you didn't weigh is the fake one. If one is heavier, then that heavier one is your fake coin.
5 0
3 years ago
Read 2 more answers
For what values of x and y would AABC-ADEF?
Murrr4er [49]
C
hope this helped!!!
8 0
3 years ago
Read 2 more answers
1/2___|-2|
Kobotan [32]

| - 2 = 2|
1/2<|-2|
4 0
3 years ago
Read 2 more answers
Other questions:
  • If John read only 10 pages of a book in an hour, how long would it take to read all the pages of the book if it has 487 pages?
    12·1 answer
  • Solve -2(x - 4) - 7 &gt; - 6
    11·1 answer
  • There are s swimmers in the swimming club. The club bought 15 swimming caps to split among its members. Write an expression that
    14·1 answer
  • How to do this. Can you maybe show me your work?
    6·1 answer
  • WILL MARK BRAINLEST PLZZ HELPPP!!!!!!!!
    13·1 answer
  • Please help ppppppppppppp
    6·2 answers
  • Please answer 4 - 9 will mark brainlyist
    13·1 answer
  • Help! Please I’m not sure what to do I forgot
    7·2 answers
  • I need help asap!! This is an i-ready lesson.
    7·2 answers
  • Identify the first five terms of the sequence in which an = 3n − 1 + 1.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!