The summit of a volcano is 10 Kilometers (km) above the ocean floor as shown below. I’d the ocean has elevation if -5 kilometers which statement describes the elevation of sea level and the summit?
A the elevation of sea level is 0 km and the elevation of the summit is 5 km
B The elevation of sea level is 5 km and the elevation of the summit is 5 km
C The elevation of sea level is 0 km and the elevation of the summit is 10 km
D The elevation of sea level is 5 km and the elevation of the summit is 10 km
Please help me thank you

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.