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
Stolb23 [73]
2 years ago
7

A set of wrist watch prices are normally distributed with a mean of 767676 dollars and a standard deviation of 101010 dollars. W

hat proportion of wrist watch prices are between 636363 dollars and 909090 dollars? You may round your answer to four decimal places. S

Mathematics
1 answer:
Akimi4 [234]2 years ago
7 0

Answer:

0.8224

Step-by-step explanation:

Data

  • mean: $76
  • standard deviation, sd: $10
  • first value of interest, x1: $63
  • second value of interest, x2: $90

z-score for x1:

z1 = (x1 - mean)/sd = (63 - 76)/10 = -1.3

z-score for x2:

z2 = (x2 - mean)/sd = (90 - 76)/10 =  1.4

The  proportion of wrist watch prices are between $63 and $90 is:

P(z1 < z < z2) = P(z < 1.4) - P(z < -1.3)

P(z < 1.4) = 0.9192 (see first picture attached)

P(z < -1.3) = 0.0968 (see second picture attached)

P(z1 < z < z2) = 0.9192 - 0.0968 = 0.8224

You might be interested in
the population of happy land is 15.8 happys per acre exactly 553 happys live in happy land. how many acres is happyland
Crank

Answer:

35 acres.

Step-by-step explanation:

Proportions:

15. 8 ⇒ 1 acre

553 ⇒  P acres

P = 553*1/15.8

P = 35 acres

5 0
1 year ago
Find the equation of the vertical line through (7,-3)
wlad13 [49]
X = 7
Is a vertical line that passes through (7,-3).
4 0
3 years ago
Log 10(x + 3) – log 10(x-3) = 1
nadezda [96]

Answer:33/9

Step-by-step explanation:

Log10(x+3)-Log10(x-3)=1

Log10((x+3)/(x-3))=1

(x+3)/(x-3)=10^1

(x+3)/(x-3)=10

Cross multiply

x+3=10(x-3)

Open brackets

x+3=10x-30

Collect like terms

10x-x=30+3

9x=33

Divide both sides by 9

9x/9=33/9

x=33/9

4 0
3 years ago
NEED HELP FAST<br> 30nPOINTS FOR BRAINLIEST<br><br><br> √5x + √6 = √9
vodka [1.7K]

\sqrt{5x} + √6 = √9


The first step is to get \sqrt{5x} by itself. We can do this by subtracting \sqrt{6} from each side, and simplifying \sqrt{9}


\sqrt{5x} = 3 - \sqrt{6}


Now we square both sides


5x = (3 - \sqrt{6})²


Using the formula (a - b)² = a² -2ab + b², (3 - \sqrt{6})² = 15 - 6\sqrt{6}


5x = 15 - 6\sqrt{6}


x = \frac{15 - 6\sqrt{6}}{5}

8 0
3 years ago
Read 2 more answers
I need help with<br> If x = 5, find the value of LaTeX: 16-x16 − x
Nina [5.8K]

Answer:

-69

Step-by-step explanation:

16-(5)(16)-(5)

16x5=80

16-80-5

16-80=-64

-64-5=-69

3 0
3 years ago
Other questions:
  • (9m+6)+(-5m-6)<br> a. 4m+12<br> b.14m+12<br> c.14m-12<br> d.4m
    11·2 answers
  • vanesa multiplies two integers. When she adds the product to 4, the sum is 0. What can you say about the two integers
    14·1 answer
  • Make a mapping diagram for the relation {(–2, –6), (0, 3), (1, –5), (5, 0)} I don't understand this.
    6·1 answer
  • During a sale all pillows are 1/4 of th regular price write an expression that represents the amount of money saved on a pillow
    8·1 answer
  • Zack bought a cost for 69.78. he paid with $100 bill and received 26.73 in change. how much was the sales tax.
    15·2 answers
  • What is an example of dealer incentives ?
    14·1 answer
  • A and B share the cost in a ratio of 3:2 the cost is £85 how much does A pay
    15·1 answer
  • One hundred is multiplied by a number between 0 and 1. Which of the following could be an answer?
    11·2 answers
  • Set X = {x|x is a whole number less than or equal to 10} and set Y = {/15, 10, 15, 20}
    14·1 answer
  • I'll give the brainiest
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!