I NEED HELP ASAP PLEASE. 13 POINTS. 1.What star, in the northern sky, is used to calculate the latitude in the northern hemisphere?

2.Where do all longitude lines cross?

3.What is the International Date Line?

4.What two hemisphere are created by the Prime Meridian?

5.Circle the set of coordinates that would be farther west? 57N,22W or 35N, 40W

6.Circle the set of coordinates that would be farther North? 57N,22W or 35N,40W.

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.)