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Semmy [17]
4 years ago
5

A 2016 Pew Research poll estimated the proportion of people supporting each presidential candidate in the fall election. They ba

sed their estimates on telephone interviews of 2,010 adults living in all 50 U.S. states. They asked each participant which presidential candidate they support, and used that data to calculate the proportions. What is the statistic in this experiment
Mathematics
1 answer:
Minchanka [31]4 years ago
8 0

Answer: The proportion of participant who support each presidential candidate

Step-by-step explanation: Statistic and parameter refers to tow similar but different words whose usage depends on the content of our observations. Parameters are used to define the participant or observations in a population while statistic defines the participants or observations in a sample which is a subset of the population. In the scenario above, the statistic refers to the proportion of people supporting each presidential candidate drawn at random from the total population of eligible voters in the United states.

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Cesium-137 has a half-life of about 30 years. A) Find the annual decay rate and round final result to 4 decimal places. B) Find
MrMuchimi

Answer:

  • 0.0228
  • 0.0231
  • 100 years
  • 0

Step-by-step explanation:

The exponential equation for the fraction remaining after x years can be written as ...

  y = (1/2)^(x/30)

A) For x=1, the fraction remaining is ...

  y = (1/2)^(1/30) ≈ 0.97716 = 1 - 0.0228

Of the original amount, 0.0228 decays each year.

__

B) The continuous decay rate is the natural log of the growth factor, so is ...

  ln(0.97716) = -0.0231

The continuous decay rate is 0.0231 of the present amount (per year).

__

C) For y=.10 (1/10 of the original amount) we find x to be ...

  .1 = .5^(x/30)

  ln(.1) = (x/30)ln(.5) . . . . . take the natural log

  30ln(0.1)/ln(0.5) = x ≈ 100 . . . years

It will take 100 years for a 10-gram sample to decay to 1 gram.

__

D) As x goes to infinity, y goes to zero.

_____

The relationship between growth rate and growth factor is ...

  growth factor = 1 + growth rate

When the growth rate is negative, it is called a decay rate.

8 0
4 years ago
BRUH HELP
TEA [102]

Answer:

(E) 9

Step-by-step explanation:

I found what numbers worked in all three cases. I found that when a = 4  b = 5  c = 0, all of the equations were satisfied.

Equation 1   4 + 5 = 9

Equation 2  4 + 0 = 4

Equation 3  5 + 0 = 5

Also, a + b+ c or 4 + 5 + 0 = 9

If these answers are correct, please make me Brainliest!

4 0
4 years ago
Beard bought 10 acres of land.She plans to divide the land into smaller lots that are each 1/20 of an acre.How many smaller lots
stich3 [128]

Answer:She will have:

N = 200 smaller lots

Step-by-step explanation: N = (total acres of land) / (smaller lots of land)

Substituting the values we have:

N = 10 / (1/20)

Rewriting we have:

N = 10 * 20

N = 200 lots

7 0
3 years ago
Find the magnitude of the
sertanlavr [38]

17.49 is the magnitude of the resultant vector. This can be obtained by adding the vectors and finding magnitude.

<h3>Calculate the magnitude of the resultant vector:</h3>

Resultant vector: vector that gives the combined effect of all the vectors. When we add two or more vectors, the outcome is the resultant vector.

For example,

  • Sum of vector (3,4) and vector (5,7)

(3,4) + (5,7) = (3+5,4+7) = (8,11)

(8,11) is the resultant vector of vector (3,4) and vector (5,7)

Magnitude of a vector: the length of the vector. The magnitude of the vector a is denoted as ∥a∥.

Magnitude of a = (a₁, a₂)

∥a∥=\sqrt{a_{1}^{2} +a_{2}^{2}   }

In the given question,

v (8,10) and w (7, -1)

Adding the vectors,

resultant vector = (8,10) + (7, -1) = (15, 9)

Magnitude of a vector (a,b) = √a²+b²

Here, magnitude = √15²+9² = √225+81 = √306 ≈ 17.49

Hence 17.49 is the magnitude of the resultant vector.

Learn more about vectors:

brainly.com/question/27870005

#SPJ1

7 0
2 years ago
1 2 3 4 5 B 10 Which statement about rational numbers is true? All rational numbers are fractions. Rational numbers never have r
aleksandrvk [35]

Answer:

all fractions containing integers are rational numbers is true I believe.

Step-by-step explanation:

8 0
3 years ago
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