Terbium-160 has a half-life of about 72 days.

after 396 days, about how many miligrams of a 220 mg sample will remain.

a) 5mg
b)12mg
c)40mg
d)194mg

show work or give the equation i am so confused

Ahigh school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing less than or equal to 225225 pounds?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?