A 40 gram sample of a substance that's used for drug research has a k-value of
0.1472.
N = Noe
-kt
No = initial mass (at time t = 0)
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

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)