The amount of a radioactive isotope present in a certain sample at time t is given by A(t)=800 - 0.02837t grams, where t years is the time since the initial amount was measured. How long will it take for the amount of the isotope to equal 516 grams.​

Which of the following is true about the products formed during photosynthesis? (5 points) select one: a. they have the same mass as the mass of reactants. b. they are the same set of compounds as the reactants. c. they have more mass than the mass of reactants. d. they are chemically the same as the reactants.