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2 years ago

A t-shirt increased in price by

Mathematics

1 answer:

AVprozaik [17]2 years ago

5 0

Step-by-step explanation:

81×1/4

=20.24

this is the answer

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Arrange the numbers in decreasing order 439.216,439.126,439.612,439.261

Free_Kalibri [48]

In decreasing order:

439.612, 439.261, 439.216, 439.126

8 0

2 years ago

Given: Set A = 1,6,9 Set B= 7, 9, 12 What is the union of sets A and B?

dmitriy555 [2]

Step-by-step explanation:

Union = elements of A + elements of B

Union = ( 1,6,7,9,12)

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2 years ago

A door to a playhouse is 50 inches tall. Which of the following is another measure equal to the height?

sashaice [31]

Answer:

A. 4 ft 2 in.

Step-by-step explanation:

50/12 = 4.1666667. Round up, so 4.1666667 becomes 4.2.

8 0

2 years ago

Read 2 more answers

In the Ardmore Hotel, 20 percent of the guests (the historical percentage) pay by American Express credit card. (a) What is the

xxMikexx [17]

Answer:

(a) The expected number of guests until the next one pays by American Express credit card is 4.

(b) The probability that the first guest to use an American Express is within the first 10 to checkout is 0.0215.

Step-by-step explanation:

The random variable X can be defined as the number of guests until the next one pays by American Express credit card

The probability that a guest paying by American Express credit card is, p = 0.20.

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

The probability mass function of X is:

$P(X=x)=(1-p)^{x}p;\ x=0,1,2,3...,\ 0$

(a)

The expected value of a Geometric distribution is:

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

Compute the expected number of guests until the next one pays by American Express credit card as follows:

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

$=\frac{1-0.20}{0.20}$

$=4$

Thus, the expected number of guests until the next one pays by American Express credit card is 4.

(b)

Compute the probability that the first guest to use an American Express is within the first 10 to checkout as follows:

$P(X=10)=(1-0.20)^{10}\times0.20$

$=0.1073741824\times 0.20\\=0.02147483648\\\approx0.0215$

Thus, the probability that the first guest to use an American Express is within the first 10 to checkout is 0.0215.

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3 years ago

if α and β are the zeroes of the polynomial 3x^2 - 8x − 3 then find the value of i) α^2 + β^2 ii) α^-1 + β^-1

BlackZzzverrR [31]

Step-by-step explanation:

the answer is in the above image

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2 years ago