Question A 25 gram sample of a substance that's used for drug research has a k-value of 0.1208.
Find the substance's half-life, in days. Round your answer to the nearest tenth.

How do you solve a question like this?

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm