hba
y varies directly as the cube of x. when x=0.5, y =2.5.if y=540 then x equals.



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hba
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@Praja_01

hba
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@jim_thompson5910 Urgent help!

hba
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@iNeedTheHelp

jim_thompson5910
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y varies directly as the cube of x
means
y = kx^3

jim_thompson5910
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when x=0.5, y =2.5
y = kx^3
2.5 = k*(0.5)^3
Solve for k

hba
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Thanks a lot


hba
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@jim_thompson5910 k=2.5/0.025 < how to solve this without a calculator :D

hba
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@jim_thompson5910 I got 100,what next ?

hba
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@jim_thompson5910 ??

jim_thompson5910
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you should have gotten k = 20

hba
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I mean i got 20 what next

jim_thompson5910
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y = kx^3
y = 20x^3
540 = 20x^3
Solve for x