L.S.

Write a differential equation to model the situation given. Do not solve. The radioactive substance neptunium-139 decays to 73.36% of its orginal amount after 24 hours. How long would it take for 43% of the original neptunium to be present? What is the ha...

dy/dx+((2x+1)/x)y=e^-2x

A tumor is assumed to be roughly spherical. If the radius R is found to be increasing at the rate of 0.5 mm/day when the radius is R=2 mm, how fast is the volume changing at this time?

That was all the information provided for this problem >.< Thank you for your response! :)

Great! Thank you I understand now :)

Great! Thank you!!