Agroup of 72 people travel to the beach for a clean-up day. some of the people bring their own supplies (such as gloves, water, and garbage bags). supplies are provided for the rest of the people. write an equation for the number of people for whom supplies will be provided, p, if b people bring their own supplies.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Which expression gives the exact value of x?