How do you solve this?

Mathematics

1 answer:

andrew-mc [135]3 years ago

7 0

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$2.76

Step-by-step explanation:

9/3.25=2.76

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Step-by-step explanation:

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2 years ago

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6. Anna can walk 10 miles in 4 hours. At this rate, how many minutes does it take her to walk one mile?

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mulch to cover a rectangular garden costs 48. mulch is needed to cover a larger, similar garden. the ratio of dimensions is 2:3.

d1i1m1o1n [39]

$\bf \qquad \qquad \textit{ratio relations}
\\\\
\begin{array}{ccccllll}
&Sides&Area&Volume\\
&-----&-----&-----\\
\cfrac{\textit{similar shape}}{\textit{similar shape}}&\cfrac{s}{s}&\cfrac{s^2}{s^2}&\cfrac{s^3}{s^3}
\end{array} \\\\
-----------------------------\\\\
\cfrac{\textit{similar shape}}{\textit{similar shape}}\qquad \cfrac{s}{s}=\cfrac{\sqrt{s^2}}{\sqrt{s^2}}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\\\\
-------------------------------$

$\bf \cfrac{\stackrel{small}{garden}}{\stackrel{large}{garden}}\qquad \stackrel{sides~ratio}{\cfrac{2}{3}}\qquad \stackrel{\textit{area ratio}}{\cfrac{s^2}{s^2}}\implies \cfrac{2^2}{3^2}
\\\\\\
\cfrac{2^2}{3^2}=\cfrac{\stackrel{small~area~cost}{48}}{\stackrel{large~area~cost}{a}}\implies \cfrac{4}{9}=\cfrac{48}{a}\implies a=\cfrac{9\cdot 48}{4}$

the ratio of the cost, is tandem to the ratio of the areas, because, to get the cost for the mulch, you have to first know how many square meters/feet have, and then you apply the cost evenly, now, the cost is just a factor, therefore, the ratio is retained.

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3 years ago

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