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
FinnZ [79.3K]
2 years ago
14

16. You found a shortcut to school that saves 5 minutes off of taking the freeway. About 1 in every 10 trips

Mathematics
1 answer:
kykrilka [37]2 years ago
6 0

Answer:

  it saves 2.5 minutes

Step-by-step explanation:

The expected value of a random variable is the sum of products of possibilities and the probability of each.

Here, you have a probability of 0.9 of saving 5 minutes, and a probability of 0.1 of adding 20 minutes.

__

The expected value of the shortcut is ...

  0.9(-5) +0.1(20) = -4.5 +2.0 = -2.5

The shortcut is expected to save 2.5 minutes on average.

_____

<em>Additional comment</em>

The probability of 0.9 comes from the 9 of 10 trips that result in a time saving.

You might be interested in
Kim works at a cake shop. She is able to make an average of 2.0 cakes an hour. Her workday is 8.5 hours. How many cakes does Kim
babunello [35]

Answer:

Kim can make 4 cakes.

Step-by-step explanation:

since you can't sell half a cake and it takes 2 hours for her to make a cake she can only make 4 cakes on an average day. hope this helps good luck in the future

8 0
3 years ago
Read 2 more answers
Suppose a random sample of 40 students from a university were asked their ages. The table below gives a summary of the reported
fomenos

Answer:

I think it is

Step-by-step explanation:

(18.0, 22.0). We are 95% confident that the mean age of university students is between 18 and 22.

4 0
2 years ago
write an equation in point-point form for the line through the given point with the givedescribe how the graph of y | x| -4 is l
Digiron [165]
a) The point-slope form of the equation of a line through point (h, k) with slope m is
  y - k = m(x - h)

In point-slope form, the equation of the line through (-3, -7) with slope -6/5 is
  y + 7 = (-6/5)(x + 3)


b) The graph of
  y = |x|-4
represents a translation downward 4 units of the graph of
  y = |x|
It retains the same general shape and axis of symmetry, but will have two (2) x-intercepts instead of one (1).

4 0
3 years ago
Name any two points on a horizontal line that is 4 units above the x-axis
hichkok12 [17]
(1,4) (2,4) (3,4) (4,4)
6 0
3 years ago
Solve and show how you did 5 (x-1) + 3 = 13
Goryan [66]
5(x-1) + 3 = 13
5x - 5 + 3 = 13
5x -2 = 13
5x = 15
x = 15/5
x = 3
4 0
4 years ago
Read 2 more answers
Other questions:
  • Kylee and two of her friends are at a museum. They find two quarters and a dime on the ground. If Kylee and her friends share th
    14·1 answer
  • The quadratic x^2-6x+66 can be written in the form (x+b)^2+c, where b and c are constants. What is b+c?
    6·1 answer
  • Find an equation of the line passing through the points (−8,2) with the slope m= 4/3
    12·1 answer
  • Which of the following statements accurately describes the expression x-2/x^2+9​
    8·1 answer
  • How many sides does a regular polygon have if each exterior angle measures 72
    8·1 answer
  • Work out the value of x when<br> X – 20 : x + 280<br> simplifies to<br> 1:4
    14·2 answers
  • The makers of the movie Harry Potter need to
    6·1 answer
  • Please help i'lll mark as brainiest
    13·1 answer
  • Please help I’ll give points
    8·1 answer
  • On Thursday, Mandy receives m messages. she doesn’t have time to read them,
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!