Section 3.21) Vermont Instruments makes two kind of calculators, the VI-83 and the VI-86. The numberof VI-83s sold each year is given by calculators x years after 1990. Thed xx( ),=12 376number of VI-86s sold each year is given by calculators x years after 1990.i xx( )=3972a) Write a formula for the total number of calculators sold by Vermont Instruments x years after1990.b) Write the formula for the rate of change of the total number of calculators sold.c) How many total calculators were sold in 2002?d) How rapidly were calculators selling in 2002? Interpret your answer.2) Total federal government expenditures (in billions of dollars) of the United States for theyears 1991 to 1998 can be modeled by y = 9.67x - 17,890.89 billion dollars in year x. a) Were total federal government expenditures increasing or decreasing during the time periodmodeled by the equation?b) How rapidly were total federal government expenditures changing in 1997?c) What was the average rate of change of total federal government expenditures between 1995and 1997?
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Federal government of the United States, Order theory, 1907, 1911, 1912, VERMONT INSTRUMENTS