When describing radioactive decay one looks at something called half-life. Half-life is the time required for exactly half of the radioactive material to decay. The isotope nickel-63 has a half-life of about 100 years. Suppose you have 15,220 atoms of nickel-63, chart the decay over the next millennium (1000 years). Round up if you have a decimal answer. How many atoms are left, and how many decayed?

they can both be solutions depends on the equation

step-by-step explanation:

what is the equation? ?

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b