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
Paraphin [41]
3 years ago
8

Choose the correct formula for combination. A . n!/r!(n-r)! B. n!/(n-r)!

Mathematics
1 answer:
OleMash [197]3 years ago
4 0

Answer:

B

Step-by-step explanation:

The number of combinations of n objects taken r at a time is determined by the following formula: C(n,r)=n!/(n−r)!

You might be interested in
Which option is a false statement about Christopher Columbus?
Lisa [10]
4th one is defo right so it’s one of the rest
7 0
2 years ago
WILL MARK BRAINLIEST!!! HELP!​
igomit [66]

Answer:

the answer is "AB"

Step-by-step explanation:

I plugged it into photomath

6 0
2 years ago
Taye recruits two people to be election campaign volunteers. The next week he ask each of those volunteers to recruit two more c
jeka94

Using a geometric sequence, it is found that:

a) For the first 5 weeks, the numbers are: 2, 4, 8, 16, 32

b) Hence some of the volunteers can stop recruiting new volunteers during the 7th week.

<h3>What is a geometric sequence?</h3>

A geometric sequence is a sequence in which the result of the division of consecutive terms is always the same, called common ratio q.

The nth term of a geometric sequence is given by:

a_n = a_1q^{n-1}

In which a_1 is the first term.

For this problem, on the first week there are 2 people, and since each new people involve two more, the common ratio is of 2, hence the parameters for the geometric sequence are:

a_1 = 2, q = 2

Hence the number of people after n weeks is:

a_n = 2 \times 2^{n - 1}

For the first 5 weeks, the numbers are:

  • a_1 = 2 \times 2^{1 - 1} = 2
  • a_2 = 2 \times 2^{2 - 1} = 4
  • a_3 = 2 \times 2^{3 - 1} = 8
  • a_4 = 2 \times 2^{4 - 1} = 16
  • a_5 = 2 \times 2^{5 - 1} = 32

There will be 150 volunteers when a_n = 150, hence:

2 \times 2^{n - 1} = 150

2^{n-1} = 75

\frac{2^n}{2} = 75

2^n = 150

n = 7...

The above is because 2^7 = 128 and 2^8 = 256, and 128 < 150 < 256.

Hence some of the volunteers can stop recruiting new volunteers during the 7th week.

More can be learned about geometric sequences at brainly.com/question/11847927

#SPJ1

3 0
1 year ago
Worth all my points plus Brainlist answer number 14 please it’s due in three hours
Lana71 [14]

Answer:

Answer below

Step-by-step explanation:

2.08

2.082

2.8

2.82

√8 (it's 2.8284)

3 0
2 years ago
Read 2 more answers
Help need by tomorrow plzzz
aliya0001 [1]
11.) 1.5
12.)17 1/2
13.)543
533+10
( Just remember absolute value.)
14.)$ 75.15

3 0
2 years ago
Other questions:
  • A library building is in the shape of a rectangle. Its floor has a length of (3x + 5) meters and a width of (5x − 1) meters. The
    6·1 answer
  • The circumference of the Earth is approximately 25,000 miles. What is this number expressed in scientific notation?
    13·2 answers
  • Need help ASAP please fellas!
    12·2 answers
  • If a man is jogging in the mountains at an incline of 3.2342 per foot how long will it take him to get to the top if hes wearing
    12·1 answer
  • NEED HEPL PLEASE !!!!
    5·2 answers
  • A watering can contained 512 quarts water. After all the plants were watered, only 4 cups remained. How many cups of water were
    10·2 answers
  • Which is the best estimation of
    14·1 answer
  • I will give you brainlyist
    14·2 answers
  • A tire rim has a diameter of 15 in. What is the circumference of the tire rim? Use 3.14 for Pi.
    9·1 answer
  • This is the last one I promise!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!