roburtjf08
1

A rectangle with dimensions of 3 units by 5 units is enlarged by a scale factor of 1.4 By what percent does its area increase?

$A_1=3*5=15\\ 3.5*1.4=4.9\\ 5*1.4=7\\ A_2=4.9*7=34.3\\ \frac{34.3}{15}*100\%=228.(6)\%\\ 228.(6)\%-100\%=128.(6)\%$
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