The price of crude oil during the period 2000-2010 can be approximated by

P(t) = 6t+ 18 dollars per barrel (0 ≤ t ≤ 10)

in year t, where t = 0 represents 2000. Saudi Arabia's crude oil production over the same period can be approximated by

Q(t) = -0.036t² + 0.62t + 8 million barrels per day (0 ≤ t ≤ 10).t

Use these models to estimate Saudi Arabia's daily oil revenue and also its rate of change in 2003. (Round your answers to the nearest $1 million.)

daily oil revenue $ million

rate of change in 2003 $ million/yr