Question 1 2 pts Over the course of a day, the temperature of the air oscillates from lower at night to warmer in the morning. The rate of change of the temperature is given by the function R(t) = cos( measured in degrees per hour, and t is measured in hours since 8am. What does the integral ( R(t) dt represent? [ Select ] At 8pm, is it warmer or cooler than it is at 2pm? [ Select ] How many degrees warmer/cooler is it at 8pm than at 2pm? [ Select ]