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Setler79 [48]
3 years ago
6

y is directly proportional to the cube root of x. if x is increased by 200%, find the % increase of y.

Mathematics
1 answer:
ozzi3 years ago
4 0

Answer:

y increases by 44.22%

Step-by-step explanation:

If y is directly proportional to cube root of x, then y can be written as

y=\sqrt[3]{x}

if x is increased by 200%, then

old x - 100%

new X - 300%

hence,

\dfrac{x}{X}=\dfrac{100}{300}\\ \\X=3x

and new Y is

Y=\sqrt[3]{X}=\sqrt[3]{3x}

Y=\sqrt[3]{3}y

Thus,

y - 100%

Y - a%

Then

\dfrac{y}{Y}=\dfrac{100}{a}

\dfrac{y}{\sqrt[3]{3} y}=\dfrac{100}{a}\\ \\\dfrac{1}{\sqrt[3]{3}}=\dfrac{100}{a}\\ \\a=100\sqrt[3]{3}\approx  144.22\%

y increases by 44.22%

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