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 <em>in scientific notation</em>
2) 5.1 x 108 = land
550.8 = land
5.508 x 10² = land <em>in scientific notation</em>
3) water - land
352,000,954 - 550.8
= 352,000,403.2
= 3.520004032 x 10⁸
4)
2.3 x = 0.023
-3.648 x 10⁸ = -364,800,000
48,482
1.45 x = 0.0000145
note: ascending is from smallest to largest
-364,800,000 ---> 0.0000145 ---> 0.023 ---> 48,482
<u> -3.648 x 10⁸</u> , <u>1.45 x </u> , <u>2.3 x </u> , <u>48,482</u>