ขอวิธีการทำและคำตอบค่ะ

HN) Exercises (1)You take 200 milligrams of a headache medicine, and after 4 hours, 120 milligrams remain in your system. If the effects of the medicine wear off when less than 80 milligrams remain, when will you need to take a second dose, assuming the anmount of medicine in your system decays exponentially? 13 ส.ค. The half-life of Radium-226 is 1590 years. If a sample initially contains 200 mg. how many milligrams will remain after 1000 years? )The half-life of Fermium-253 is 3 days. If a sample initially contains 100 mg, how many milligrams will remain after 1 week? บ้อ The half-life of Erbium-165 is 10.4 hours. After 24 hours a sample still contains 2 mg. What was the initial mass of the sample, and how much will remain after another 3 days? The half-life of Nobelium-259 is 58 minutes. After 3 hours a sample still contains10 mg. What was the initial mass of the sample, and how much will remain after another 8 hours? (6) A scientist begins with 250 grams of a radioactive substance. After 225 minutes, the sample has decayed to 32 grams. Find the half-life of this substance. A wooden artifact from an archeological dig contains 60 percent of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years.)

ช่วยทีค้าบบบ🙏🏻

1. Given (กำหนดให้) น(ท) = e",v(s) = In s , s(t) = t^ and (และ) t (w) = -|w| dน 1.1 Find (จงหา) dt dน 1.2 Find (จงหา) w=1 dt " dy ป1-16x2 -4 2. Let (กำหนดให้) y = arccos(4x). Prove that (จงพิสูจน์ว่า) - dx

ช่วยแนะนำหนังสือแคล1 แคล2หน่อยค่ะ

2ข้อนี้คิดยังไงหรอคะ รบกวนช่วยอธิบายหรืิอขอวิธีทำอย่างละเอียดหน่อยค่ะ 1. For a grated school, an executive committee wants to know if the... อ่านต่อ

ช่วยหาเรนจ์ของ f(x)= log(3x-1)+4 หน่อยค่ะ