The absolute value of a number is always greater than its opposite. is this true?
a. no; the absolute value of a negative number is equal to its opposite.
b. no; all negative numbers are greater than their opposites.

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?