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vodka [1.7K]
3 years ago
9

Which of the following shows the cost, gratuity percent, and tax percent rounded correctly in order to make a reasonable estimat

e? Cost: $40; Gratuity: 20%; Tax: 0% Cost: $40; Gratuity: 20%; Tax: 10% Cost: $50; Gratuity: 10%; Tax: 10% Cost: $50; Gratuity: 20%; Tax: 10%
Mathematics
2 answers:
monitta3 years ago
5 0

The correct answer is B

IgorLugansk [536]3 years ago
4 0

Answer: b

Step-by-step explanation:

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Suppose that lithium calculator battery with a charge of 3 volts, actually has a voltage with uniform distribution between 2.93
Dmitrij [34]

Answer:

b. E(X) = 3.015, STDEV(X)= 0.049, P (X ≤ 2.98) = 0.2941

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The mean of the uniform probability distribution is:

M = \frac{a + b}{2}

The standard deviation of the uniform distribution is:

S = \sqrt{\frac{(b-a)^{2}}{12}}

The probability that we find a value X lower than x is given by the following formula.

P(X \leq x) = \frac{x - a}{b-a}

Uniform distribution between 2.93 and 3.1 volts

This means that a = 2.93, b = 3.1. So

Mean:

M = \frac{2.93 + 3.1}{2} = 3.015

Standard deviation:

S = \sqrt{\frac{(3.1 - 2.93)^{2}}{12}} = 0.049

What is the probability that a battery has a voltage less than 2.98?

P(X \leq 2.98) = \frac{2.98 - 2.93}{3.1 - 2.93} = 0.2941

So the correct answer is:

b. E(X) = 3.015, STDEV(X)= 0.049, P (X ≤ 2.98) = 0.2941

6 0
3 years ago
I really need help please
anastassius [24]

9514 1404 393

Answer:

  60

Step-by-step explanation:

The minimum number required is the least common multiple (LCM) of 15 and 4. The numbers 15 and 4 have no common factors, so their LCM is their product.

  15×4 = 60 strands are required

6 0
2 years ago
Lesson 9 functions, equations, and graphs unit test part 1
Tatiana [17]

Answer:

what is the question?

Step-by-step explanation:

6 0
2 years ago
Anyone please help me
Tomtit [17]
Yeah I think it’s 12 hope that helped...
5 0
2 years ago
Read 2 more answers
Question is in the link thx!!
Vlad1618 [11]

Hello there!

Surface Area = 4pir^2

First, we need to find our radius, since we have our diameter all we need to do is divide it by 2. That means, 10 divided by 2 equals 5.

Our radius is 5.

Now, we can plug it into the formula.

4(3.14)(5^2)

4(3.14)(25)

4(78.5)

4(78.5) = 314

Now, convert into pi.

314 = 100pi or 100Π

6 0
3 years ago
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