The capacities at which U.S. nuclear power plants are working are shown in table for various years. Year Percent 1975 56 1980 59 1985 58 1990 70 1995 76 2000 88 2004 89 Let f(t) be the capacity (in percent) at which U.S. nuclear power plants are working at t years since 1970. A model of the situation is f(t)=0.027t2+0.216t+53.296 Estimate at what capacity U. S. nuclear power plants were working in 2007. % Round to the nearest whole percent. Predict when U. S. nuclear power plants will be working at full (100%) capacity. Enter the year this occurs.

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A: Year Cubic Feet(trillions 1997 5.76 1998 5.98 1999 6.26 2000 6.47 2001 6.60

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Q: annual maintenance expenses based on the weekly usage in hours. b1 =  (Keep found decimal places)

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.