Mary buys 8 widgets for $40.00. she adds $1.00 in enhancements to each widget and sells them for $9.00 each. what is mary's estimated gross profit margin?

Its due 1. what is the product of 1/2-1/4? write your answer in standard form.a) show your work.b) is the product of 1/2x-1/4 and 5x^2-2x+6 equal to product of 1/4x-1/2 and 5x^2-2x+6? explain your answer.