PLEASE NEED HELP ASAP 20 points How many months will it take for 500 grams of Arsenic in soil to reduce

to 100 grams, if the half-life is 78 months?

What is the value of f(x) = 2.2 for f(-2)?

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Tyler reads 2/5 of a book on monday, 1/3 of it on tuesday, 2/9 of it on wednesday, and 3/4 of the remainder on thursday. if he still has 14 pages left to read on friday, how many pages are there in the book?