Question

A 40 gram sample of substance that's used for drug research has a k-value of 0.1455.

Find the substance's half-life, in days.
Round your answer to the nearest tenth.

Answer 1

40x0.1455 is 121.3 

121.3 is the answer

Answer 2

Answer:

4.8

Step-by-step explanation:

Simply Put This in Calculator

0.5 In / 0.1455

0.5 In = -0.693147180559945309417232121455818

In(0.5) / 0.1455 = -4.76389814811783182777816640650046

Round 4.76 to 4.8