Question

Nexl Question ntum 90 is a radoacive material that decays acconding to the function A2, where Ap is the intial amount present and A is the amount presant e Sme t (ih years) Asume thar a scentst his a ntum 90 What is the decay rate of stronsum 907 How much stronium 90 is left after 10 years? When will only 200 grams of stronbum 90 be left? grams of What is the half-ife of strontium 907 What is the decay rate of strontium 9o? 244s (Type an ieger or a decimal Include the negative sign for the decay rate) )How much stronium 90 is lefh aher 10 years oproximately 392gam Do not round untl the final answer. Then round to the nearest whole number as needed) c) When wil only 200 grams of stroetium 90 be let In about yeas Do not round unsl the final answer. Then round to the nearest tenth as needed (e) What is the hai-ite of strontium 90 pproximataly 24 years (Do not round until the nal anawer Then ound to the eth a)

Answer 1

Vev 나 ts time in years K(decay is hapening we veprien 니 ー0124 20 Ozuut oo24 lort

901% --O '애나 ut oro24y