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schepotkina [342]
2 years ago
15

Joanne bought a box of pens for $3.75. There are 100 pens in a box. The pens individually cost 7 cents. How much money did she s

ave? A. $3.25 B. $0.38 C. $7.00 D. $10.75
Mathematics
2 answers:
lesantik [10]2 years ago
7 0

Answer:

The answer is C) $7.00

PtichkaEL [24]2 years ago
4 0

Answer: A $3.25

Step-by-step explanation:

Each pen cost 7pm. So 100 pens would have cost 7p x 100 = $7

She bought a box of hundred for $3.75

He actually saved:

7 - 3.75 = 3.25

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The area of the entire figure below is 111 square unit.
Ivahew [28]

The striped rectangle has a total area of 69,375 cm².

<h3>How to calculate the area of the striped rectangle?</h3>

To find the area of the striped rectangle we must carry out the following procedures.

Find the area of each segment of the rectangle, that is, what is the area of each of the 24 squares that make up the rectangle, for that we divide the 111cm² of the total area into 24.

  • 111cm² ÷ 24 = 4.625cm²

According to the above, we infer that each square has an area of 4.625cm².

On the other hand, to find the area of the striped rectangle we must take into account that it is 5 squares long by 3 squares high, that is, its area is 15 squares.

  • 3 × 5 = 15

Finally, each square has an area of 4.625cm², so to find the total area of the striped area we must multiply the area of each square by the number of squares.

15 × 4.625cm² = 69.375cm²

Learn more about areas in: brainly.com/question/27683633

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2 years ago
What do the following two equations represent?​
dmitriy555 [2]

Answer:

perpendicular lines

Step-by-step explanation:

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2 years ago
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The 9th graders are selling tickets to raise money for a class field trip. They are selling student tickets for $5 and adult tic
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For this answer I believe it would be best if you did it on paper
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7 0
3 years ago
The auto parts department of an automotive dealership sends out a mean of 4.2 special orders daily. What is the probability that
gregori [183]

The probability that, for any day, the number of special orders sent out will be exactly 3 is 0.1633.

<h3>What are some of the properties of Poisson distribution?</h3>

The Poisson distribution is a discrete probability distribution that describes the likelihood of a specific number of events occurring in a specified span of time or space, if these events occur at a constant mean rate and regardless of the time since the last occurrence.

Let X ~ Pois(λ)

Then we have:

E(X) = λ = Var(X)

Since standard deviation is the square root (positive) of variance,

Thus,

The standard deviation of X = \sqrt{\lambda}

Its probability function is given by

f(k; λ) = Pr(X = k) =   \dfrac{\lambda^{k}e^{-\lambda}}{k!}

Given the mean is 4.2.

We have to find the probability that on any day, the number of special orders sent out will be exactly 3. Therefore, the value of x will be 5.

Using the Poisson distribution,

P(x) = \dfrac{e^{-\lambda}\lambda ^x}{x!}\\\\P(5) =\dfrac{e^{-4.2}(4.2)^5}{5!}\\\\P(5) = 0.1633

Hence, the probability that, for any day, the number of special orders sent out will be exactly 3 is 0.1633.

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