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3 years ago

Can be used to compare changes from one period to another.

Mathematics

1 answer:

vlada-n [284]3 years ago

8 0

Answer:

c) Percentages

Step-by-step explanation:

Percentages can be used to compare changes from one period to another.

In calculating a percentage change, either a percentage increase or percentage decrease, we must have both the new and old measurement of the specific quantity.

For example, let's find percentage increase of the number of students that joined a book club using the parameters below;

Original number of students = 32

New number of students = 36

We will calculate the increase using;

$Increase = original \; number - new \; number$

Substituting the values, we have;

Increase = 36 - 32 = 4

$Percentage \; increase = \frac{increase}{original \; number} * 100$

$Percentage \; increase = \frac{4}{32} * 100$

$Percentage \; increase = 0.125 * 100$

Percentage increase = 12.5%

Therefore, the number of students in the school club increased by 12.5%.

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anzhelika [568]

Answer is C. 7:42
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And from the ratio 7:42, 42/7 is also 6
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Another way is that 3:18 can be rewritten as 3/18 which is simplified to 1/6. 7:42 = 7/42 which also equals 1/6.

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None of the other answers simplify to this but C.

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kati45 [8]

$\bf \textit{equation of a circle}\\\\ 
(x- h)^2+(y- k)^2= r^2
\qquad 
center~~(\stackrel{}{ h},\stackrel{}{ k})\qquad \qquad 
radius=\stackrel{}{ r}\\\\
-------------------------------\\\\
(x+1)^2+y^2=36\implies [x-(\stackrel{h}{-1})]^2+[y-\stackrel{k}{0}]^2=\stackrel{r}{6^2}~~~~
\begin{cases}
\stackrel{center}{(-1,0)}\\
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so, that's the equation of the circle, and that's its center, any point "ON" the circle, namely on its circumference, will have a distance to the center of 6 units, since that's the radius.

$\bf ~~~~~~~~~~~~\textit{distance between 2 points}
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A(\stackrel{x_2}{-1}~,~\stackrel{y_2}{1})\qquad \qquad 
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$\bf ~~~~~~~~~~~~\textit{distance between 2 points}
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(\stackrel{x_1}{-1}~,~\stackrel{y_1}{0})\qquad 
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$\bf ~~~~~~~~~~~~\textit{distance between 2 points}
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AVprozaik [17]

Answer:

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Step-by-step explanation:

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