When radioactive substances decay, the amount remaining will form a geometric sequence when measured over constant intervals of time. the table shows the amount of a radioactive isotope initially and after 2 hours. what are the amounts left after 1 hour, 3 hours, and 4 hours? hours elapsed: 0 1 2 3 4. grams of the isotope: 1866 __ 471 __ __ !

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At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.