Hoi Chong Transport, Ltd., operates a fleet of delivery trucks in Singapore. The company has determined that if a truck is driven 177,000 kilometers during a year, the average operating cost is 12.3 cents per kilometer. If a truck is driven only 118,000 kilometers during a year, the average operating cost increases to 15.5 cents per kilometer. Required:
a. Using the high-low method, estimate the variable and fixed cost elements of the annual cost of the truck operation.
b. Express the variable and fixed costs in the form Y = a + bX.
c. If a truck were driven 147,000 kilometers during a year, what total cost would you expect to be incurred?

Rate of return, standard deviation, coefficient of variation personal finance problem mike is searching for a stock to include in his current stock portfolio. he is interested in hi-tech inc.; he has been impressed with the company's computer products and believes hi-tech is an innovative market player. however, mike realizes that any time you consider a technology stock, risk is a major concern. the rule he follows is to include only securities with a coefficient of variation of returns below 1.07. mike has obtained the following price information for the period 2015 through 2018:hi-tech stock, being growth-oriented, did not pay any dividends during these 4 years. a. calculate the rate of return for each year, 2015 through 2018, for hi-tech stock. b. assume that each year's return is equally probable and calculate the average return over this time period. c. calculate the standard deviation of returns over the past 4 years. (hint: treat this data as a sample.) d. based on b and c determine the coefficient of variation of returns for the security. e. given the calculation in d what should be mike's decision regarding the inclusion of hi-tech stock in his portfolio?