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zlopas [31]
2 years ago
14

Zina goes to the store to buy markers. An 8-pack of markers costs $10.99, but it does not have the color that she wants. A 12-pa

ck of markers has the right color, but the price label below is damaged, and she can't read the total price. Zina can see that the 12-pack has the same unit cost as the 8-pack. Write a proportion that Zina can use to determine how much the 12-pack of markers will cost. Use C to represent the cost of the 12-pack of markers.
Mathematics
1 answer:
olga2289 [7]2 years ago
3 0

Using proportions, it is found that the cost of the 12-pack of markers, in dollars, is of:

  • C = \frac{10.99 \times 12}{8} = 16.5

<h3>Proportions:</h3>
  • This question is solved by <em>proportions</em>, using a rule of three.
  • The cost of a 8-pack of markers is of $10.99. What is the cost of a 12-pack?

The <em>rule of three</em> is:

8 pack - $10.99

12-pack - $C

Applying cross multiplication:

8C = 10.99 \times 12

C = \frac{10.99 \times 12}{8} = 16.5

To learn more about proportions, you can take a look at brainly.com/question/24372153

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What is the volume of the sphere that has a diameter of 3? use 3.14 for pie​
aev [14]

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Answer:

  • <u>1</u><u>1</u><u>3</u><u>.</u><u>0</u><u>4</u><u> </u><u>unit </u><u>cube</u>

Step-by-step explanation:

In this question we are provided with a sphere <u>having</u><u> </u><u>radius </u><u>3 </u><u>units </u>and <u>value </u><u>of </u><u>π </u><u>is </u><u>3.</u><u>1</u><u>4</u><u> </u><u>.</u><u> </u>And we're asked to find the<u> </u><u>volume</u><u> of</u><u> </u><u>sphere</u><u> </u><u>.</u>

For finding volume of sphere , we need to know its formula . So ,

\qquad \qquad \: \underline{\boxed{ \frak{Volume_{(Sphere)} =  \dfrac{4}{3} \pi r {}^{3} }}}

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<u>Sol</u><u>u</u><u>tion </u><u>:</u><u> </u><u>-</u>

Now , we are substituting value of π and radius in the formula ,

\quad \longrightarrow \qquad \: \dfrac{4}{3}   \times 3.14 \times (3) {}^{3}

Simplifying it ,

\quad \longrightarrow \qquad \: \dfrac{4}{3}  \times 3.14 \times 3 \times 3 \times 3

Cancelling 3 with 3 :

\quad \longrightarrow \qquad \: \dfrac{4}{ \cancel{3}}  \times 3.14 \times 3 \times 3 \times  \cancel{3}

We get ,

\quad \longrightarrow \qquad \:4 \times 3.14 \times 9

Multiplying 4 and 3.14 :

\quad \longrightarrow \qquad \:12.56 \times 9

Multiplying 12.56 and 9 :

\quad \longrightarrow \qquad \:    \pink{\underline{\boxed{\frak{113.04  \: unit \: cube}}}} \quad \bigstar

  • <u>Henceforth</u><u> </u><u>,</u><u> </u><u>volume</u><u> </u><u>of</u><u> </u><u>sphere</u><u> </u><u>having </u><u>radius </u><u>3 </u><u>units </u><u>is </u><em><u>1</u></em><em><u>1</u></em><em><u>3</u></em><em><u> </u></em><em><u>.</u></em><em><u>0</u></em><em><u>4</u></em><em><u> </u></em><em><u>units </u></em><em><u>cube </u></em><em><u>.</u></em>

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1 year ago
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Helga [31]
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6 0
2 years ago
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Step2247 [10]

Answer:

100

Step-by-step explanation:

because 4, 3, and 2 all make 180 and 4 and 2 are both 40 so you add that which makes 80 and then you take 180 and subtract 80 which gives you 100

6 0
3 years ago
Read 2 more answers
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Helga [31]

Answer:

2

Step-by-step explanation:

Its pretty easy math

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