Which of the following best describes why astronauts have to wear gravity boots when they are on the moon but not when they are on the Earth?
A)The moon's gravity is stronger than Earth's gravity.

B)The moon's surface is denser than the Earth's surface.

C)The Earth's gravity pulls them down to the Earth's surface.

D The Earth's surface is magnetic, but the moon's surface is not

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.)