the mass of an object varies directly as the cube of its length L
M=250, L=5
find M when L= 7
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Step-by-step explanation:
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FrancexX
FrancexX
03/22/2020
Mathematics
Middle School
answered
The mass, m, of an object varies directly as the cube of its length, I.
m= 250 when I = 5.
Find m when I = 7
2
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PollyP52
Answer:
m = 686.
Step-by-step explanation:
Direct variation :
m= kl^3 where k is a constant.
m = 250 when l = 5, so
250 = k *(5)^3
k = 250 / 125 = 2
So the equation of variation is m = 2l^3.
When l = 7:
m = 2 * (7)*3
= 2 * 343
= 686.
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