Cell Phone Ad Spending A certain industry's ad spending between 2005(t=1) and 2011(t=7) is projected to be. S(t)=0.84t0.34(1t7) where S(t) is measured in bilions of dollars and t is measured in years. What is the prejected average spending per year on these ads between 2005 and 2011 ? (Round your answer to twa deomal ploces.) x bitionyrr