Situation: Find the substance's half-life, in days.
Round your answer to the nearest tenth.
A 40 gram sample of a substance that's
used for drug research has a k-value of
0.1472.
Enter the correct answer.
N - Noe
-kt
DONE
No - initial mass (at time t = 0)
112
N = mass at time t
k= a positive constant that depends on
the substance itself and on the units
used to measure time
t = time, in days

1. convert. simplify your answer and write it as a proper fraction or as a whole or as a mixed number.4oz =_ pounds2. what is 1/3 of 66for both show work.

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 2x + 3y is less than negative 3 over 2 times x minus 4part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points)part b: is the point (â’4, 6) included in the solution area for the system? justify your answer mathematically. (4 points)