Answer:
300
Step-by-step explanation:
if you mean, 245.320
I think the answer is None because half life of seven years means it's full life is 14 years and after 20 years there would not be any left
The answer is 6 x 3 x 3 = 54.
I found this by finding the surface area with 9 x 6 and then seeing that 6 x 3 x 3 gives the same answer knew that one was correct, but I'm sure there's an easier way, good luck.
Multiply by the conjugate and simplify.
−11/13 - 10i/13
