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Bacteria X has a relative growth rate of 180 % (under ideal conditions). Some bacteria X are accidentally introduced into some twirly macaroni salad. Four hours after contamination, there were 40,000 bacteria X in the twirly macaroni salad. Find the initial number of bacteria X introduced into the twirly macaroni salad: D bacteria Estimate the number of bacteria in the food 5 hours after contamination. D bacteria An amount of $6000 is invested at an interest rate of 9% per year, compounded semiannually. Find the value A(t) of the investment after 7: years. A(t) : D dollars Note: remember to express yourfunction in the variable t. Make a graph of A(t). Which graph most closely resembles the graph of A(t)? Note: you can click on the graphs to get a larger view. Each graph goes to 40 on the xaxis and 48000 on the yaxis. O / . / c-Z K' Use your graph ofA(t) to determine when this investment will amount to $40,000. Give your answer in years, correct to the nearest hundredth. You will have to zoom on your graph to determine the answer. Q years If 25700 dollars is invested at an interest rate of 7 percent per year, find the value of the investment at the end of 5 years for the following compounding methods. (21) Annual: Your answer is C] (b) Semiannual: Your answer is C] ((3) Monthly: Your answer is C] (d) Daily: Your answer is C] (e) Continuously: Your answer is C]