Elementary arithmetics

1003099201

Level: 
A
A toe sometimes appears as a unit of energy in various publications. One toe is a unit of energy defined as the amount of energy released by burning one tonne of crude oil and it equals 41868MJ (1MJ=1000000J). How many joules are in 1 toe?
4.18681010
4.1868108
4.1868109
4.18681011

1003099204

Level: 
A
Consider the information given in the table. Calculate the shortest distance between Neptune (the farthest planet from the Sun) and Mercury (the closest planet to the Sun). PlanetDistance from the Sun (km)Mercury5.8107Neptune4.5109
4.442109km
4.558109km
1.3107km
1.3109km