Question: U.S. CENSUS The number of Americans aged 45-54 yr (which stood at 25 million at the beginning of 1990) grew at the rate of
R(t) = 0.00933t3 + 0.019t2 - 0.10833t + 1.3467
Million people/year, t yr from the beginning of 1990. How many Americans aged 45 to 54 were added to the population between 1990 and the year 2000?