4. suppose a laboratory has a 31 g sample of polonium-210. the half-life of
polonium-210 is about 138 days.
a. how many half-lives of polonium-210 occur in 966 days?
b. how much polonium is in the sample 966 days later?

What is the equation of the graph below? y=sec(x)-4

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days