Think the quality of it is based off of the amount of time some one worked on something. 2. If all of the data values in the class were compiled in a giant histogram, and a curve was drawn over the graph, where should the highest point on the curve occur? It should be were the mode is because there is the most of the mode in the data set. 3. What phase(s) of a design process might statistics be most applicable? The revising stage. 4. Other than dial calipers, what kinds of tools are used to precisely measure objects for purposes of quality control? A ruler/ measuring tape or you can use a scale and you could measure well.
Answer:
The differential equation is 
Step-by-step explanation:
Differential equation for the rate of change in radiation level:
Radiation level is R.
Rate of change indicates that the radiation level R varies in function of time t, which mathematically means that we have:

After the reactor is shut down, the radiation from the nitrogen-17 decreases in such a way that the rate of change in the radiation level is directly proportional to the radiation level.
Rate of change is k. Decreases means that k is negative. Proportional to the radiation level of R means that -k multiplies R. So the differential equation is:

D 24 do order of operations perenthesis, exponents, multiplication or division, addition or subtraction