Answer: 17.832 kg
Solution: (4458 grams)*(4 books)*

= 17.832 kg
0.248 rounded to the nearest tenth is 0.2 because 4 comes after and if there is a number after the number that you are rounding that is less than 5, you keep the number and do not change it.
0.59 = (1 - 0.000125)^^x where x = number of years of decay
ln 0.59 = x ln(0.999875)
x = 4221 to nearest year
Answer:
well I guess 8(3+7) or 7(8+3)