Mathematics, 07.03.2021 23:20 cookies1164
A lab currently has 70 mg of radioactive material that decays at 3.5% per year. Federal regulation for the substance says that the material must be safely stored until it reaches its half-life, at which time the material can be disposed.
How many years will the lab have to safely
store the material before disposal?
Answers: 2
Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 20:20
How do the number line graphs of the solutions sets of -23 > x and x-23 differ?
Answers: 1
Mathematics, 21.06.2019 21:00
When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years
Answers: 1
A lab currently has 70 mg of radioactive material that decays at 3.5% per year. Federal regulation f...
Biology, 04.12.2020 01:00
Mathematics, 04.12.2020 01:00
Mathematics, 04.12.2020 01:00
Geography, 04.12.2020 01:00
Mathematics, 04.12.2020 01:00
Mathematics, 04.12.2020 01:00
Biology, 04.12.2020 01:00
Social Studies, 04.12.2020 01:00
English, 04.12.2020 01:00
Chemistry, 04.12.2020 01:00