A. Basics of quantities and precision1. Convert each of the following to the appropriate SI unit, with appropriatesignificant digits, and with appropriate use of scientific notation. Note: alwaysuse 365.25 days per year (10 marks):a) 0.00014000 years:b) 0.002560000000000007 tonnes:c) 1.369 nm:d) 140,000,000 Mg/km3:e) 0.0009450 m2:2. How many significant digits are in each of the following values? (5 marks)a) 0.0007600b) 1.7890c) 0.000000000101d) 0.0000000001010e) 5.67*1062 of 43. Answer the following arithmetic questions, with a final response in the correctSI units (where necessary). Use scientific notation where appropriate only. (14marks)a) 124.1 g + 35.678 mg =b) 124.16 km – 350.7 m =c) 23.1 m2+ 345.65 ha =d) 5600.023 cm3÷ 6 cm2=e) 100 W m-2x 4.56 J s-1m-2– 23.567 W m-2=f) 1.02x106km2÷ 1.02x106km2=g) (236589 dm + 441911 dm) ÷ 1.00 years =4. If the surface area of the earth is 510,100,000 km2what is the radius of theearth (in metres)? (Assume: the earth is a sphere, the surface area of a sphere is4pr2, and p = 3.14). If you were able to travel this distance in 6.15 days, howfast would your average speed be (in km h-1