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3 years ago

(A) How many ways can a 2-person subcommittee be selected from a committee of 8 people?

Mathematics

1 answer:

fgiga [73]3 years ago

8 0

Answer:

A: 36

B: 64

Step-by-step explanation:

nCr (8,2)

nCr = (n+r-1)!/r!(n-1)!

(8+2-1)!/2!(8-1)!

362880/10080

nPr (8,2)

nPr = n^r

8^2

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At Burnt Mesa Pueblo, archaeological studies have used the method of tree-ring dating in an effort to determine when prehistoric

olya-2409 [2.1K]

Answer:

(1204 ; 1288) ;

(1162 ; 1330) ;

(1120 ; 1372)

Step-by-step explanation:

Given that:

Mean, m = 1246 years

Standard deviation, s = 42 years

68% is within one standard deviation the mean ;

Therefore 68% equals ;

mean ± 1(standard deviation)

(1246 - 1(42)) ; (1246 + 1(42))

1204 ; 1288

B) b. a range of years centered 95% about the mean in Which about Of the data (tree-ring dates) will be found between______ and ________ A.D.

95% is within two standard deviation of the mean ;

Therefore 95% equals ;

mean ± 2(standard deviation)

(1246 - 2(42)) ; (1246 + 2(42)

(1246 - 84) ; (1246 + 84)

(1162 ; 1330)

c. a range of years centered about the mean in Which almost all the data (tree-ring dates) Will be found between_____ and A.D.

About 99.7% which is within 3 standard deviations of the mean

99.7% is within 3 standard deviations of the mean ;

Therefore ;

mean ± 3(standard deviation)

(1246 - 3(42)) ; (1246 + 3(42))

(1120 ; 1372)

4 0

3 years ago

Simplify each expression using order of operations to reveal a fact about Earth Day. Earth Day is observed in this many countrie

wlad13 [49]

Answer:

YOOOOOOOOSHI :33

Step-by-step explanation:

3 0

3 years ago

The volume of a mini-basketball is approximately 4846.59 cubic centimeters. What is the approximate radius of a mini-basketball?

Sati [7]

Answer:

10.49823 centimeters

Step-by-step explanation:

Simply reverse the formula for the volume of a sphere: pi*r^3*(4/3).

So: pi*r^3*(4/3)=4846.59

r^3*(4/3)=1542.71751128

r^3*4=4628.15253384

r^3=1157.03813346

r=10.49823

7 0

3 years ago

PLS HELP I WILL GIVE BRAINLYEST!!!!!!

KiRa [710]

Answer:

36 is the answer

Step-by-step explanation:

7 0

3 years ago

I dont know how to do this so yeah

Ulleksa [173]

Answer:

a). x = 12

b). m∠H = 90°

m∠I = 58°

m∠J = 62°

Step-by-step explanation:

a). Use the property of a triangle,

" Sum of all the angles in a triangle is 180°"

(2x + 34)° + (4x + 14)° = 180°

(2x + 4x) + (34 + 14) = 180

6x + 48 = 180

6x = 180 - 48

6x = 132

x = $\frac{132}{6}$

x = 12

b). m∠H = 90° [Given]

m∠I = (2x + 34)° = [(2 × 12) + 34]°

m∠I = 58°

m∠J = (4x + 14)° = [(4 × 12) + 14]°

m∠J = 62°

3 0

3 years ago