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
Inessa [10]
3 years ago
9

Assume the random variable x is normally distributed with mean μ = 80 and standard deviation σ = 4. Find the indicated probabili

ty.
P(x < 72) = _____ (round to four decimal places as needed).
Mathematics
1 answer:
Schach [20]3 years ago
6 0

Answer:

0.2278

Step-by-step explanation:

z = (x-μ)/σ,

where x is the raw score

μ is the population mean

σ is the population standard deviation

z => 72 - 80/4

= -2

Probability value from Z-Table:

P(x ≤ 72) = P(x = 72) => P(x < 72)

0.02275

Approximately =>0.2278

You might be interested in
Tina pet sits to earn extra money. She charges a flat service fee of $20, plus $15 per day. If one of her customers spent less t
Tems11 [23]

Answer:

D. $15x+20<$110

Step-by-step explanation:

$15 times the number of days plus the service fee should be less than $110.

4 0
3 years ago
Which of the following is a geometric sequence with a common ratio of 2?
rosijanka [135]
The answer C.
Since the common ratio is 2
You just need to multiply each number with two to get the next number
14x2=28
28x2=56
56x2= 112
6 0
3 years ago
F(x)=(-3x+2) and g(x)=(2x^2-5x-1)
pashok25 [27]

Answer: -6x² + 15x + 5

Step-by-step explanation:

To solve this problem, you only need to substitute g(x)'s equation as the value of the x in f(x), then simplify.

Step 1: f(x) = -3(2x² - 5x - 1) + 2

Step 2: Apply the distributive property

-3(2x²) + -3(-5x) + -3(-1)

-6x² + 15x + 3

Step 3: Simplify

f(x) = -6x² + 15x + 3 + 2

f(x) = -6x² + 15x + 5

6 0
3 years ago
Solve the decimal division application round to the nearest 10th if needed there are approximately 39.37 inches in 1 m determine
Shtirlitz [24]

Answer:

  D.  1000 meters

Step-by-step explanation:

(39370 in)/(39.37 in/m) = (39.37×1000)/(39.37) m = 1000 m

3 0
3 years ago
A number n plus 7 is less than or equal to 9
devlian [24]
N ≤ 2, if n plus 7 is less than or equal to 9 (n+7 ≤ 9) then carry the 7 over to create n ≤ 9-7 giving the answer n ≤ 2 (n less than or equal to 2)
7 0
3 years ago
Other questions:
  • What is the minimum number of triangles needed to construct a hexagon?
    15·2 answers
  • The expression 9+219+21 factored using the GCF is
    6·1 answer
  • I'd seriously appreciate it if anyone could help ASAP! I'll give Brainliest!
    11·1 answer
  • After cutting 1 5/8 in. off the end of a piece of molding, a carpenter had the exact length that he needed, which was 32 1/8 in.
    9·1 answer
  • PLEASE HELP!!
    9·1 answer
  • A jar contains 5 blue marbles, 8 red marbles, 4 white marbles, and 3 purple marbles. Suppose you pick a marble at random without
    13·1 answer
  • Simplify the expression 3x -2y+6-6x+5y-8
    9·2 answers
  • Please answer the complex system
    7·1 answer
  • I need a serious help!
    12·1 answer
  • A pet store has three fish tanks each holding a different volume of water in a different number of fish to a holds 4 L and five
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!