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
natali 33 [55]
3 years ago
14

How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick?

Mathematics
2 answers:
Jlenok [28]3 years ago
8 0
Use the permutation formula
nPr = (n!)/((n-r)!)
20P15 = (20!)/((20-15)!)
20P15 = (20!)/(5!)

The final answer is choice A

Inga [223]3 years ago
8 0
The correct answer is A turned this in got a 100 hoped this helped ya.
You might be interested in
Solve for x. −3/4(x+2)=6
Sergio039 [100]
X= -10        I hoped this helped you answer your question!
3 0
3 years ago
When a trinomial is factored as (x + m)(x + n), what is the product of m and n?
klemol [59]
The answer is c the degree of the trinomial
7 0
3 years ago
Read 2 more answers
In Canada, households spent an average of $80.63 CDN monthly for high-speed broadband access.24 Assume that the standard deviati
ELEN [110]

Answer:

Step-by-step explanation:

Assuming a normal distribution for the amount spent by Canadian households for high-speed broadband access, the formula for normal distribution is expressed as

z = (x - u)/s

Where

x = amount spent by the Canadian households.

u = mean amount spent monthly.

s = standard deviation

From the information given,

u = $80.63 CDN

s = $27.32 CDN

We want to find the probability that the average amount will exceed $85. It is expressed as

P(x greater than 85) = 1 - P(x lesser than or equal to 85)

For x = 85

z = (85 - 80)/27.32 = 0.18

Looking at the normal distribution table, the corresponding z score is 0.57142

P(x greater than 85) = 1 - 0.57142 = 0.43

3 0
3 years ago
The Carter family just left the local pet store with Rex, their new family dog. The pet store owner told the Carter family that
Korolek [52]

Answer:

A.)

In 2 months, Rex is 6 pounds and in 8 months he's 9lbs (from 2 to 8 is 6 months). So I inferred that to get to 9lbs from 6lbs is to go 0.5 pounds more each month.

B.)

2 = 6

3 = 6.5

4 = 7

5 = 7.5

6 = 8

7 = 8.5

8 = 9

C.) I don't think I can create a linear model here. So I don't think its nessesary.

D.)

If Rex were to grow over the expected 6 months, it would be 45.

5 0
3 years ago
Question 6 (Yes/No Worth 1 points)<br> (02.01 LC)<br> Is the following relation a function?
kirza4 [7]

Answer: No.

Step-by-step explanation: 4 and -1 are both tied to 1 in the map. A function can never have 2 values.

4 0
2 years ago
Read 2 more answers
Other questions:
  • What is the equation of the line in the graph?
    13·1 answer
  • Which bank has the highest possible overdraft fee? Bank Account Terms and Conditions Bank A has a 0 dollar overdraft fee if link
    15·1 answer
  • A cone-shaped paper drinking cup is to be made to hold 27 cm of water. Find the height h and radius r of the cup that will use t
    6·1 answer
  • What is the mixed fraction to this answer? 4 1/2+ 5 2/3
    14·2 answers
  • A weather report said there is a 60% chance of rain on Monday, and a
    8·1 answer
  • Sal is tiling his entryway. The floor plan is drawn on a unit grid. Each unit length represents 1 foot. Tile costs $1.65 per squ
    14·1 answer
  • Which of the following is not a real number?
    5·1 answer
  • Chris correctly measured the length of a lone segmentand rounded his answer​
    6·1 answer
  • Your dog is 8 years younger than your friend. In 2 years, your friend will be three times as old as your dog. How old is your do
    11·1 answer
  • Roger expressed 1/5%<br> as 1/500. Ellen expressed 1/5% as 100/5. Who is<br> correct? Explain.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!