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enyata [817]
3 years ago
9

Sam and his friends had​ take-out spaghetti and meatballs for dinner. The tax was​ $3. The tax rate is​ 7.5%. What was the price

of the dinners including​ tax?
Mathematics
2 answers:
IrinaK [193]3 years ago
7 0

Answer:

$40 is the correct answer

loris [4]3 years ago
5 0

Answer:

$43 including tax

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The answer to the question is 3 8/33
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3 years ago
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 <em>X</em> 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, <em>p</em> = 0.20.

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

The probability mass function of <em>X</em> 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.

3 0
3 years ago
Help me please‼️
aksik [14]

Answer:

a.

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4 0
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Cloud [144]
All will apply except for (A, C, and E) because those lengths are less than 4/6. So (B, D and F) are the correct answers.
6 0
3 years ago
Select the correct answer.
vovangra [49]

Answer:

B

Step-by-step explanation:

think of the ratios as equivalent fractions. 2 over 14 is NOT equal to 3 over 42.

6 0
3 years ago
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