Amotorist driving at 25 meters/second decelerates to
15 meters/second. the combined mass of the vehicle and the driver is 1.5 × 10³ kilograms. what is the amount of mechanical work done by the vehicle?
a) 7.5 x 10^4 joules
b) 1.5 x 10^5 joules
c) 3.0 x 10^5 joules
d) 6.2 x 10^5 joules

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.