To test an individual's use of a certain mineral, a researcher injects small amount of a radioactive form of that mineral into the person's bloodstream. The mineral remaining is the bloodstream is measured each day for several days. Suppose the amount of the mineral remaining in the bloodstream (in milligrams per cubic centimeter) t days after the initial injection is approximated by:

C(t)= 1/2 (4t+ 4)- 1/2

Find the rate of change of the mineral level with respect to time for 7.5 days.

dC/dt = 2 mg*cm³/s

Step-by-step explanation:

Given

C(t)= (1/2)*(4t+ 4)- (1/2)

we apply dC/dt as follows

dC/dt = d((1/2)*(4t+ 4)- (1/2))/dt = (1/2)*(4) = 2

⇒   dC/dt = 2 mg*cm³/s

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)

40 minutes

step-by-step explanation:

add the time and multiply by 2