66) 67) olve the problem 66) What is the late on an investment that triples $4848 in 3 years? Assume interest is compounded monthly A) 465% B) 31.0% C)372% D) 248% 67) How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 800e-207, where t is the time in years? Round your answer to the nearest hundredth year A) 35.64 years B) 32 29 years C) 335 years D) 165.60 years a 68) An artifact is discovered at a certain site. If it has 52% of the carbon-14 it originally contained, what 68) is the approximate age of the artifact to the nearest year? (carbon-14 decays at the rate of 0.0125% annually) A) 5231 years B) 3840 years C) 4160 years D) 2272 years 69) How long will it take for $9800 to grow to $14,500 at an interest rate of 6.1% if the interest is 69) compounded continuously? Round the number of years to the nearest hundredth. A) 6 42 B) 642 24 C) 0.64 D) 0 24