Simone knows that there are more hours of daylight during the summer season. which of the follolwing is a possible combination of daylight and darkness during one rotation of earth on itrs axis in the summertime.

a. 8 hours of daylight th 4 hours of darkness.
b. 275 days of daylight with 90 days of darkness.
c. 14 hours of daylight with 10 hours of darkness.
d. 90 days of daylight with 0 days of darkness.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.