4) A radioactive isotope has a half-life of 10 days. Malik starts with 100 grams of this isotope . After 50 days, how many grams of the isotope will remain? Round your answer to the nearest gram.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)