Suppose a sample of a radioactive substance weighs 36 mg. One year later, the sample weighs 29.5 mg. What is the half-life of this substance? (Round your answer to two decimal places.)

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb