Eric starts with 10 milligrams of a radioactive substance. The amount of the substance
decreases by each week for a number of weeks, w. He writes the expression
100)" to find the amount of radioactive substance remaining after w weeks.
Andrea starts with 1 milligram of a radioactive substance. The amount of the substance
decreases by 20% each week for a number of weeks, w. She writes the expression
(1 -0.2)" to find the amount of radioactive substance remaining after w weeks.
Use the drop-down menus to explain what each part of Eric's and Andrea's
expressions mean.

i got 142 as my answer

step-by-step explanation:

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

cosine

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.