A software author invests his royalties in two accounts for 1 yr.
(a) The first account pays 2% simple interest. If he invests x dollars in this account, write an expression for y1 in terms of x, where y1 represents the amount of interest earned.
(b) He invests in a second account $500 more than he invested in the first account. This second account pays 1.5% simple interest. Write an expression for y2, where y2 represents the amount of interest earned.
(c) What does y1 + y2 represent?
(d) How much interest will he receive if $250 is invested in the first account?
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