Question

it is given that x = a^2. If a is decreased by 10% then how much does x decrease by

Answer 1

@ganeshie8

Answer 2

\(x=a^2\)
let \(x=100\),then \(a=10\)
\(a'=a\times 0.9=10\times 0.9=9\)
\(x'=(a')^2=81\)
\(\%~decrease=\dfrac{100-81}{100}\times 100=19\)
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