In the graphic below, lines a and b are: A. skew lines.
B. parallel lines.
C. perpendicular lines.
D. transversal.

(i really need this one)

Last year, laura had $30,000 to invest. she invested some of it in an account that paid 7% simple interest per year, and she invested the rest in an account that paid 8% simple interest per year. after one year, she received a total of $2230 in interest. how much did she invest in each account?