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3 years ago

2PLZ HELP 13+points

Mathematics

2 answers:

Luda [366]3 years ago

7 0

Answer:

The answer is D

Step-by-step explanation:

-BARSIC- [3]3 years ago

3 0

Probability is 6/14 or roughly 43% and answer D

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The ratio of carbon-14 to carbon-12 in a piece of wood discovered in a cave is R = 1/917. Estimate the age of the piece of wood

Colt1911 [192]

Answer:

The answer is " $\bold{6.6 \times 10^{12}\ years}$ "

Step-by-step explanation:

Let the given value is:

$R=\frac{1}{9^{17}}\\\\\to \frac{N_{c_{14}}}{N_{c_{12}}}=\frac{1}{9^{17}}\\\\\to t=\frac{2.303 \times 9^{17}}{5717}=6.6\times 10^{12}\ years$

7 0

3 years ago

A person calls people to ask if they would like to extend their automobile insurance beyond the normal3years. The probability th

Sonbull [250]

Using the binomial distribution, it is found that there is a 0.0231 = 2.31% probability that the first person to say yes will occur with the seventh customer.

For each person, there are only two possible outcomes, either they say yes, or they say no. The probability of a person saying yes is independent of any other person, which means that the binomial distribution is used to solve this question.

Binomial probability distribution

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.
n is the number of trials.
p is the probability of a success on a single trial.

In this problem:

The probability that the seventh person is the first to say yes is P(X = 0) when n = 6(first six say no) multiplied by 0.37(probability the seventh say yes).
37% say yes, hence $p = 0.37$

Then:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{6,0}.(0.37)^{0}.(0.63)^{6} = 0.0625$

$p = 0.37(0.0625) = 0.0231$

0.0231 = 2.31% probability that the first person to say yes will occur with the seventh customer.

A similar problem is given at brainly.com/question/24863377

3 0

2 years ago

Simplify the following expression. (1/7 + 3/8) + (2/9x - 1/8)

Sophie [7]

Answer:

2/9x+11/28

PLZ MARK ME BRAINLIEST

4 0

3 years ago

When we first learn arithmetic, we focus on working with whole numbers. Then, we extend our understanding to fractions and negat

vodka [1.7K]

Answer:

I don't think I can remember every skill I was taught through the years but in Kindergarten we used Number Sense so we could understand the meaning of more and less also there's estimation and PEMDAS. I've also learned how to round up so that the solution is at least around those numbers if the skill is to be applied.

hope that helps

Step-by-step explanation:

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2 years ago

What are the coefficients in the polynomial 4x2 + 3x-3?

Ksenya-84 [330]

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$\diamond\large\blue\textsf{\textbf{\underline{\underline{Question:-}}}}$

What are the coefficients in the polynomial 4x²+3x-3?

$\diamond\large\blue\textsf{\textbf{\underline{\underline{Answer and How to solve:-}}}}\diamond$

<u>Coefficient:-</u> A number before a variable

<u>Coefficients in this polynomial:-</u>

4 (the number before x²) and 3 (the number before x)

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So we conclude that the right option is:-

$\bigcirc\!\!\!\!\!\large\checkmark$ 4, 3 (Option B)

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4 0

2 years ago