A particular product has a declared weight of 60 gm. Assume that the process mean is 61.8 gm and the standard deviation is 1.5 gm. Assume that the weight is normally distributed. a) What proportion of product will be above the declared weight? b) Determine the proportion of product below 95% of the declared weight. c) Determine the proportion of product between 60 gm and 63 gm.

Xinhong company is considering replacing one of its manufacturing machines. the machine has a book value of $39,000 and a remaining useful life of 5 years, at which time its salvage value will be zero. it has a current market value of $49,000. variable manufacturing costs are $33,300 per year for this machine. information on two alternative replacement machines follows. alternative a alternative b cost $ 115,000 $ 117,000 variable manufacturing costs per year 22,900 10,100 1. calculate the total change in net income if alternative a and b is adopted. 2. should xinhong keep or replace its manufacturing machine