Kaileika invests $2200 in one account and $2400 in an account paying 3% higher interest. At the end of one year she had earned $440 in interest. At what rates did she invest?
The candle burned at a rate of 0.75 inches per hour and its initial length was b inches, Write an equation for L, in terms of t, representing the length of the candle remaining unburned, in inches, t hours after the candle was lit.