An engineer who is saving for her retirement plans to deposit 5500 every quarter, starting one quarter from now, Into an investment account. If the account pays interest at 6 per year, compounded semiannually, the total she will have at the end of 25 years is closest to OA 556.400 8.5112.800 None D. 579.700 OE 550.000 You are newly appointed Technical Manager at the mine. Your General Manager asked you with a decision to choose between sing a shaft or usine dump truces to transporto from undergroud to surface of the mine Dump trucks will have an operating costs of 573,691 per month with the first cost of R414817. Income is expected to be 612.151 per month, with expenses for utility, labour taxes, etc expected to average 366,37% per month Alternatively that will cost R2214925 to sink and R263514 per months opera Income is expected to be 998.099 if the salage values are assumed to be 10 of the first cost for dump trucks and 35 of the first cost of the charter Sering period determine annual worth for shaft sinking at an interest rate of 1208 per compounded monthly