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
Salsk061 [2.6K]
3 years ago
5

Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ =

141 seconds and a standard deviation σ = 7 seconds. Suppose that to qualify for the Nationals, a woman must complete the 200-meter backstroke in less than 128 seconds. What proportion of competitive female swimmers will qualify for the Nationals? Give your answer to four (4) decimal places.
Mathematics
1 answer:
Natali [406]3 years ago
6 0
Answer: The proportion that will qualify is 0.0314 or 3.14%.

First, we need to find the z-score of a time of 128 seconds. To do this, we find the difference of the mean and score and divide by the standard deviation.

(128 - 141) / 7 = -1.86

Now, use a standard normal distribution table to determine the percent below a z-score of -1.86. That value is 0.0314 or 3.14%.
You might be interested in
Select option that continues pattern? 3,-6,12,4,20
harkovskaia [24]
The pattern is - 8 so the answer is 12.
4 0
3 years ago
Given f(x) = 6(1-X), what is the value of f(8)?
andrey2020 [161]

Answer:

-42

Step-by-step explanation:

f(8)=6(1-8)

because of that 1-8 is -7 so you times by 6 and get -42

8 0
2 years ago
Find the root(s) of the equation x^2=100
Akimi4 [234]

Answer:

x=10,−10

simple, it could be negative OR positive :D

5 0
3 years ago
What are the coordinates of A after a translation to the right by 4 units and up 1 unit?
Schach [20]

Answer:(4,1)

Step-by-step explanation: over the x axis 4 and up 1 with the y axis

7 0
3 years ago
1 The legs of a triangle are 6 cm and 8 cm. The hypotenuse is 14 cm. Is it a right triangle?
Vitek1552 [10]

Answer:

this is not a right triangle

Step-by-step explanation:

^  = squared

The formula forthe Pythagorean theorem is    a^+ b^   = c^

If this is a right triangle this must be true

6^ +    8^   =   14^

36 + 64 =  196

100  is not equal to 196

So this is not a right triangle

3 0
3 years ago
Other questions:
  • A sales associate is given a $500 hiring bonus with a new job. She earns an average commision of $250 per week for the next 12 w
    14·1 answer
  • Can y'all help me step by step with number 5
    14·1 answer
  • Plz help if you know THANK YOU SO MUCH?BIG POINTS ON THIS TO FOR WHO EVER ANSWERS
    14·1 answer
  • Ari and his 3 brothers want to take a school trip to Washington, D.C. They have $320 saved. Each of them will save $18 a week un
    9·1 answer
  • Helpp please!!!
    9·1 answer
  • 4x when x = 3/4 (I really need help)
    14·1 answer
  • 3x - 2y = 10
    14·1 answer
  • Given h(x) = -3x + 2, solve for x when h(x) = -4.​
    8·1 answer
  • A circle has a radius of 6 inches and a central angle of 60°. What is the measure of the arc length associated with this angle?
    11·1 answer
  • Please I need help! I'll give brainiest please! And explain how you got your answer please!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!