2.3

11. [-/1 Points] DETAILS TANAPCALC10 2.3.026. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Worker Efficiency An efficiency study showed that the average worker at Delphi Electronics assembled cordless telephones at a rate represented by the following function where f(t) is phones/hour, t hr after starting work during the morning shift. f (t ) = (- 3)+2 + 6t + 10 where (0 s t s 4) At what rate (in phones per hour) does the average worker assemble telephones 4 hr after starting work? phones per hour Need Help? Read It 12. [-/2 Points] DETAILS TANAPCALC10 2.3.028. MY NOTES ASK YOUR TEACHER Baby Boomers and Social Secrurity Benefits Aging baby boomers will put a strain on Social Security benefits unless Congress takes action. The Social Security benefits to be paid out from 2010 through 2040 are projected to be S(t) = 0.1375t2 + 0.5185t + 0.72 (0 s t