2 points You are driving at a speed of 25 m/s when an ambulance, approaches
from behind at 45 m/s and with a siren frequency of 1,400 Hz the temperature lowers to a bitter -5°C. You hear a different frequency
from the siren before it passes you compared to after it passes you. What
is the difference in the frequencies you hear?

The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)