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01-12-2018
Mathematics

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Knowing that a is inversely proportional to b2 and when b=4 a is equal to 5, find the value of a when b=4/5

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01-12-2018

Answer:

a = 16

Step-by-step explanation:

inversely proportional

y = k/x

a = k/b

5 = k/4

solve for k

multiply by 4 on each side

20 =k

a = 20b

if b = 4/5

a = 20 * 4/5

a = 16

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