You have 80 grams of a radioactive kind of cadmium. How much will be left after 90 days if its half-life is 45 days?

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

we need to see the graph to know but

strong positive is if it is going up from left to right in a straight diagonal line (like this /)

strong negative is the same but from right to left (like this \)

weak negative is the same as strong negative but its more straight line still right to left

and weak positive is the same as strong positive but more a straight line still left to right though.