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3 years ago

Will give brainliest

Mathematics

1 answer:

jeyben [28]3 years ago

3 0

Answer:

Step-by-step explanation:

Given, 

Dimensions of the rectangular prism = 9ft, 12ft and 4ft

Therefore, 

Surface area of the rectangular prism

= 2( lb + bh + lh)

$= 2(12 \times 9 + 9 \times 4 + 12 \times 4) {ft}^{2}$

$= 2(108 + 36 + 48) {ft}^{2}$

$= 2 \times 192 {ft}^{2}$

$= 384 {ft}^{2}$

Hence,

Surface area of rectangular prism is 384 sq. ft (Ans)

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The CEO of a clothing company estimates that 52% of customers will make a purchase. Part A: How many customers should a salesper

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Answer:

(a) The expected number of should a salesperson expect until she finds a customer that makes a purchase is 0.9231.

(b) The probability that a salesperson helps 3 customers until she finds the first person to make a purchase is 0.058.

Step-by-step explanation:

Let the random variable X be defined as the number of customers the salesperson assists before a customer makes a purchase.

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The random variable X follows a Geometric distribution since it describes the distribution of the number of trials before the first success.

The probability mass function of X is:

$P(X=x)=(1-p)^{x}p$

The expected value of a Geometric distribution is:

$E(X)=\frac{1-p}{p}$

(a)

Compute the expected number of should a salesperson expect until she finds a customer that makes a purchase as follows:

$E(X)=\frac{1-p}{p}$

$=\frac{1-0.52}{0.52}\\=0.9231$

This, the expected number of should a salesperson expect until she finds a customer that makes a purchase is 0.9231.

(b)

Compute the probability that a salesperson helps 3 customers until she finds the first person to make a purchase as follows:

$P(X=3)=(1-0.52)^{3}\times0.52\\=0.110592\times 0.52\\=0.05750784\\\approx 0.058$

Thus, the probability that a salesperson helps 3 customers until she finds the first person to make a purchase is 0.058.

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3 years ago

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Answer:

The answer is

Step-by-step explanation:

Equation of a line is y = mx + c

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Since the lines are parallel their slope are also the same

That's

Slope of the parallel line is also - 4

Equation of the line using point ( 1 , 2) is

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The answer to your question would be A

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