Need help on questions 2,3 and 4. 2.Calculate the ideal mechanical advantage of the lever system. 3.Calculate the ideal effort force needed to overcome the known resistance force. 4.Calculate the actual mechanical advantage of the lever system.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.