Pls, ! brainliest and 100 points!

problem #1
the following table compares mount whitney"s height, in meters, to other monumental peaks of the world.

mountain location height (in meters)
of highest peak
mount whitney california, united states 4,418.38 meters
mount fuji fuji-hakone-izu national park, japan 3,775.86 meters
mount everest great himalayas of southern asia 8,849.87 meters
mount kilimanjaro tanzania, africa 5,894.83 meters
mount olympus mytikas, greece 2,919.07 meters

use the data in the table to complete parts a, b, and c. in your final answers, include your work for all estimates and calculations.
part a:

use scientific notation to estimate the following:

how many times greater is mount everest's highest peak than mount olympus's?

part b:

use scientific notation to calculate the following:

how many times greater is mount everest's highest peak than mount olympus's?

part c:

given the calculation in part b comparing the highest peaks of mount everest and mount olympus, can you conclude that the estimate in part a is reasonable? answer in complete sentences.

problem #2
sara and sam are each working on a science project in which they need to research the individual masses of the nine planets (including the dwarf planet pluto as the ninth planet). sara completes her data for the planets' masses in kilograms while sam's data is in milligrams. use the following data tables to complete parts i, ii, and iii.

sara:
planet: mass: (in kilograms)
jupiter 1.989 · 10^27
saturn 5.685 · 10^26
neptune 1.024 · 10^26
uranus 8.681 · 10^25
earth 5.974 · 10^24
venus 4.869 · 10^24
mars 6.419 · 10^23
mercury 3.302 · 10^23
pluto 1.31 · 10^22

sam:
planet mass (in milligrams)
jupiter 1.989 · 10^33
saturn 5.685 · 10^32
neptune 1.024 · 10^32
uranus 8.681 · 10^31
earth 5.974 · 10^30
venus 4.869 · 10^30
mars 6.419 · 10^29
mercury 3.302 · 10^29
pluto 1.31 · 10^28

part i: although both data tables represent correct data for each of the planet’s masses, who represented jupiter’s mass with the most appropriate units, sara or sam?

part ii: in two or more complete sentences, explain your reasoning for your answer in part i.

part iii: use multiplication, division, and scientific notation to show that sara’s representation of jupiter’s mass in kilograms is equal to sam’s representation of jupiter’s mass in milligrams.

1. use milligrams to prove that 1.989 · 1027 kilograms are equal to 1.989 · 1033 milligrams.
2. use kilograms to prove that 1.989 · 1033 milligrams are equal to 1.989 · 1027 kilograms.