J0.02а - 1.5b 3D 4 50. l %3D 1.8 0.5b — 0.02а

The half-life of radioactive iodine is 60 days. How much of a 50-mg sample will be left in 40 days?

The half-life of a radioactive material is about 34.2 years. How much of the material is left after 20 years?

Find the intensity of light at a depth of 12 meter if I0=14 and k=0.7. Round to two decimals.

A driver of a car stopped at a gas station to fill up his gas tank. He looked at his watch, and the time read exactly 3:40 p.m. At this time, he started pumping gas into the tank. At exactly 3:44, the tank was full and he noticed that he had pumped 10.7 gallons. What is the average rate of flow of the gasoline into the gas tank?

Differentiate. y3 2Vx P. (2x) =D xp

If mzQPS = (15x+ 8) and mR = (10r-3), find mzR. %3D S.

Solve. y = 10x + 10 y = 2x – 6 %3D

If y = 5 when x = -3, find x when y = -1. %3D

Find 의= Cot Gom %3D X+1