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
Fantom [35]
3 years ago
9

Your roommate Dave eats one of two things for breakfast each day. Eighty percent of the time he has eggs for breakfast, and twen

ty percent of the time he has stale bread. After eating his breakfast he walks to class and for each person he sees, he randomly chooses to either wave hello nicely or scowl angrily. If he eats eggs then each time he sees a person he has a 90% probability of waving hello nicely, and each time he sees a person he has a 10% probability of scowling angrily. If he eats stale bread, then each time he sees a person he has a 60% probability of waving hello nicely, and each time he sees a person he has a 40% probability of scowling angrily. Dave's Greeting probability for each person by breakfast choice Breakfast choice Greeting Eggs Stale bread Wave nicely 90% for each person he sees 10% Scowl angrily 60% 40% (a) Dave eats breakfast and walks to class. On his way he sees n people. Derive an expression in terms of n and k for the probability that he will scowl angrily at k people and wave nicely to n k people. In other words find the following conditional probability: P(Scowls at k|Sees n people) (b) Suppose Dave sees n people on his way to class, waves nicely to n-k and scowls at k. Derive an expression for the probability he ate stale bread for breakfast. In other words, find the following conditional probability: P(Stale bread Saw n people, scowled at k)
Mathematics
1 answer:
Usimov [2.4K]3 years ago
5 0

Answer:

9000 pounds 100%

Step-by-step explanation:

dave is fat

You might be interested in
Help with these two math questions thank u :)
Tju [1.3M]

Answer:

1.) - (4, 4)    2.) - (3,5) Hope this helps!!

4 0
3 years ago
Which statement compares the two numbers correctly?
Alex_Xolod [135]
Six hundred seventy-two thousandths <0.8
7 0
2 years ago
Read 2 more answers
If three times a number minus 2 equals 13, what is the number?
Nana76 [90]
Change the messy words into numerals
3     times          a number         minus            2           equals         13
3          ×                n                     -                 2               =               13

3n - 2 = 13
take 2 to the other side
3n - 2 + (2)  = 13 + (2)
3n = 15

Divide by 3 on either sides to isolate n
\frac{3n}{3} = \frac{15}{3}
3 and 3 cancels out

n = 5

check:
3 times 5 minus 2 equals 13
3     ×    5       -      2     =     13
15    -      2        =          13
13            =               13

The number is 5
3 0
3 years ago
Height
dem82 [27]

Answer:

<h3>1 secs</h3>

Step-by-step explanation:

Given the height of the discus can be modeled by the equation y=−16x ^2 +32x+4, where y represents the  height in feet of the discus in seconds, the velocity of the discus at its maximum height is zero.

Velocity v = dy/dx = 0

dy/dx = -32x + 32

0 = -32x + 32

32x = 32

x = 1 secs

Hence it will take the discus 1 secs to reach its maximum height

8 0
3 years ago
Find the LinReg line of best fit for this data set.
finlep [7]

The LinReg line of best fit for this data set is ŷ = -1.24X + 0.66

<h3>What is regression line?</h3>

A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable.

Given:

(−5, 6.3),

(−4, 5.6),

(−3, 4.8),

(−2, 3.1),

(−1, 2.5),

(0, 1.0),

(1, −1.4)

Sum of X = -14

Sum of Y = 21.9

Mean X = -2

Mean Y = 3.1286

Sum of squares (SSX) = 28

Sum of products (SP) = -34.6

Regression Equation,

ŷ = bX + a

b = SP/SSX = -34.6/28 = -1.23571

a = MY - bMX = 3.13 - (-1.24*-2) = 0.65714

ŷ = -1.23571X + 0.65714

ŷ = -1.24X + 0.66

Learn more about regression line here:

brainly.com/question/7656407

#SPJ1

3 0
2 years ago
Other questions:
  • Can someone help i need step by step so i can understand. thank you​
    9·2 answers
  • Jason's age is 1/2 of his brother's age. His brother's age can be represented by the expression 12a - 9. Write an expression tha
    7·1 answer
  • A car dealer wants to draw a Pie Graph representing the different types of cars he sold in a given month. He sold a total of 90
    7·1 answer
  • Enter the number that belongs in the green box
    14·1 answer
  • A mountain trail will cover 4,855 feet vertically over a horizontal distance of 17,625 feet.
    9·1 answer
  • 1/3 + 1/9 need help fast help
    6·2 answers
  • 10
    9·1 answer
  • I got this homework packet , I did some of the questions but graphs are what I’m stuck on the most .
    14·1 answer
  • Right. This is French, but I can’t choose both subjects, so y’all can help in any of both languages idrc. I just have zero soddi
    5·1 answer
  • Jerry was using matrices to solve the system of three equations. He has shown all his steps. Did he make a mistake if so in what
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!