1. Alex and Judy are 32 miles apart on a calm lake paddling toward each other. Alex paddles at 5 mph, while Judy paddles at 8 mph. How lomng will it take them to meet?
2. Mellissa invested a sum of money at 3% simple interest. She invested three times that sum at 5% annual simple interest. If her total yearly interst from both investments was $7,200, how much was invested at 3%?
3. A chemist needs 140 ml of a 64% solution but has only 20% and 76% solution available. Find how many ml of each that should be mixed to get the desired solutiuon?
2. Mellissa invested a sum of money at 3% simple interest. She invested three times that sum at 5% annual simple interest. If her total yearly interst from both investments was $7,200, how much was invested at 3%?
3. A chemist needs 140 ml of a 64% solution but has only 20% and 76% solution available. Find how many ml of each that should be mixed to get the desired solutiuon?