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Eva8 [605]
3 years ago
5

The cost of a pack of 12 pens is $3.24. Find the the unit price in dollars per pen. If necessary, round your answer to the neare

st cent.
Mathematics
2 answers:
Mnenie [13.5K]3 years ago
8 0

Answer:

27 cents each

Step-by-step explanation:

3.24/12=.27

Ray Of Light [21]3 years ago
8 0

Answer:

The unit price in dollars per pen is $0.27

Step-by-step explanation:

If we know that 12 pens is $3.24, we need to find the cost per pen.

So we can set up an equation like this:

                     12                              1

            ___________ =      ____________

                    3.24                            x

Now, we cross multiply:

  • 12x = 3.24
  • Divide by 12 on both sides to solve for x
  • x = 0.27

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Afina-wow [57]

Answer:

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Step-by-step explanation:

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3 years ago
Consider a large shipment of 400 refrigerators, of which 40 have defective compressors. If X is the number among 15 randomly sel
Vlad [161]

Answer:

The required probability is 0.94

Step-by-step explanation:

Consider the provided information.

There are 400 refrigerators, of which 40 have defective compressors.

Therefore N = 400 and X = 40

The probability of defective compressors is:

\frac{40}{400}=0.10

It is given that If X is the number among 15 randomly selected refrigerators that have defective compressors,

That means n=15

Apply the probability density function.

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

We need to find P(X ≤ 3)

P(X\leq3) =P(X=0)+P(X=1)+P(X=2)+P(X=3)\\P(X\leq3) =\frac{15!}{15!}(0.1)^0(1-0.1)^{15}+\frac{15!}{14!}(0.1)^1(1-0.1)^{14}+\frac{15!}{13!2!}(0.1)^2(1-0.1)^{13}+\frac{15!}{12!3!}(0.1)^3(1-0.1)^{12}\\

P(X\leq3) =0.944444369992\approx 0.94

Hence, the required probability is 0.94

4 0
3 years ago
Answers to 5 and 6 please need help please!
Tresset [83]

My friend says 5 is 60 and 6 is b.

8 0
3 years ago
Zack bought a coat for $69.78. He paid with a $100 bill and received $26.73 in change.How Much was the sales tax? Show your work
Sindrei [870]
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Answer:

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Step-by-step explanation:

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