Write the following in scientific notation using powers of 10: 12). 600,000,000 = ____ x 10 ____ 13). 4,200,000 = ____ x 10 ____ 14). 800 = _____________ 15). 14 = ______________ Write the following as decimal numbers: 16). 6.2 x 104 = _____________ 17). 4.8 x 108 = ______________ Scientific notation is used in science to describe really big and really small numbers. Here are some scientific facts. Write the numbers as whole numbers (with zeroes ). Write small. 18). The distance to the moon is approximately 4 x 108 meters.     4 x 108= _____________________ 19). The distance to the sun is approximately 1.5 x 1011 meters.     1.5 x 1011= _____________________ Doing arithmetic with scientific notation: Do the indicated arithmetic and then express the answer as a decimal: (Use your calculator) Multiply: (Multiply the coefficients and add the exponents) 20).   2.8 x 104 x 1.4 x 103 = ____ x 10 ___ In decimal: ____________ 21).   3.2 x 10-4 x 3.3 x 103 = ____ x 10 ___ In decimal: ______________ Divide: (Divide the coefficients and subtract the second exponent from the first) 22).   2.8 x 104 ÷ 1.4 x 103 = ____ x 10 ___ In decimal: ____________ 23).   9.6 x 10-4 ÷ 3.2 x 103 = ____ x 10 ___ In decimal: _____________ Add: (Rewrite making the exponents the same and then add the coefficients) 24).  3.7 x 104 +     4.2 x 103 =          3.7 x 104 + ____ x 104 = _____ x 10 ___ In decimal: ________________ 25).   1.8 x 102 +   2.2 x 103 =          1.8 x 102 + ____ x 102 = _____ x 10 ___ In decimal: ________________