2. An airplane heads north of east by 18° for a distance of 67 km then heads due north for 39 km. What is the planes total displacement? Use
i. parallelogram method
I
ii. Cosine and sine rule

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.