You have 80 grams of a radioactive kind of europium. If its half-life is 9 years, how much will be left after 27 years?

9514 1404 393

  10 g

Step-by-step explanation:

27 years is 3 times the 9-year half-life. This means the quantity remaining has been cut in half 3 times:

  ((80×1/2)×1/2)×1/2 = 10 . . . . grams

the answer is 10g

Step-by-step explanation:

:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

there are no choices to this, can you give us some choices so that i can answer it

step-by-step explanation: