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2 years ago

Marą purchased a cell

Mathematics

1 answer:

DanielleElmas [232]2 years ago

6 0

Answer: $28.30✔️

Step-by-step explanation:

Let C = cost before tax

Cell phone costs = C + C·6% = $30

C(1 + 0.06) = $30

C = $30/1.06 = $28.30

Answer: $28.30✔️

<h3> Verify </h3>

Cell phone after tax = $28.30 + $28.30·6/100 = $28.30 + $1.70 = $30✔️

<h2><em>Spymore </em></h2>

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2. The ratio of radii of two cylinders is 1:2 and heights are in the ratio 2:3. Find the ratio of their volumes.

Savatey [412]

Answer: $\frac{1}{6}$ or $1:6$

Step-by-step explanation:

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$V=\pi r^2h$

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Therefore, you know this:

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Simplifying, you get:

$\frac{V_1}{V_2} =\frac{ r_1^2h_1}{ r_2^2h_2}$

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3 years ago

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2 years ago

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ICE Princess25 [194]

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Step-by-step explanation:

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Sample standard deviation, s = 12

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