Holly deposited $7,000 in a cd and will get charged penalties if she makes withdrawals within five years. however, she will need this money to pay for college tuition next year. what saving and investing principle should holly have followed?

The owner of firewood to go is considering buying a hydraulic wood splitter which sells for $50,000. he figures it will cost an additional $100 per cord to purchase and split wood with this machine, while he can sell each cord of split wood for $125. if, for this machine, design capacity is 50 cords per day, effective capacity is 40 cords per day, and actual output is expected to be 32 cords per day, what would be its efficiency?