The average person living in argentinea consumes about 145 pounds of beef per year. the average person in the us consumes 3/5 as much. how many pounds of beef does the average american consume every year?

The volume of a spherical hot air balloon v(r) = 4 3 ? r3 changes as its radius changes. the radius is a function of time given by r(t) = 3t. find the instantaneous rate of change of the volume with respect to t at t = 2.