Answer:
a) The Net present value of Australian Gold Mine = $466,300
The Net present value of U.S. Gold Mine = $ 269,250
b) The Net present value of Australian Gold Mine = - $393,900
At this increased cost of capital which is the discount rate ,the decision of selecting Australian Gold Mine should not be selected. in this case selecting the u.s Gold mine will be the best option
Step-by-step explanation: