A plane is flying above the ocean and approaching a deserted island. A right triangle is formed as shown in the figure. Use this image to write the following trig ratios in simplified form.
10 Km
8 km
6 Km

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?