1) salt water + fresh water = total water
352,000,000 + (9 x 106) = total water
352,000,000 + 954 = total water
352,000,954 = total water
3.52000954 x 10⁸ = total water in scientific notation
2) 5.1 x 108 = land
550.8 = land
5.508 x 10² = land in scientific notation
3) water - land
352,000,954 - 550.8
= 352,000,403.2
= 3.520004032 x 10⁸
4)
2.3 x [tex] 10^{-2} [/tex] = 0.023
-3.648 x 10⁸ = -364,800,000
48,482
1.45 x [tex] 10^{-5} [/tex] = 0.0000145
note: ascending is from smallest to largest
-364,800,000 ---> 0.0000145 ---> 0.023 ---> 48,482
-3.648 x 10⁸ , 1.45 x [tex] 10^{-5} [/tex] , 2.3 x [tex] 10^{-2} [/tex] , 48,482
