Answer:
c
Step-by-step explanation:
(x+8)+(x+4)=0
×=-8 and ×= -4
Answer:
45%
Step-by-step explanation:
Answer:
There's no picture for us to refer to. I need a picture to answer the question.
<span>As the age of the U-235 sample is 2.631 billion years, and the half-life of U-235 is 713 million years, the sample has undergone 2.361 X 1,000,000,000 / 713 X 1,000,000 = 3.69 half lives. In each half-life the sample reduces to half its original weight according to the radioactive Half-Life Formula:
ln (Nt /N0) = -kt, where N0 = mass of the original weight of radioactive material, Nt = mass of radioactive material at time t, k = decay constant and t = time interval . We have to put Nt/N0 = 1/2 for time interval = half-life.</span>
Base = 5
height = 12
Area = (5*12)/2 = 30 m²