suppose a sheet of 100 stamps is 0.78 millimiters thick. If a stack of sheets contains 100,000,000 stamps, how many millimiters thick is the stack? Write the answer in scientific notation.

Question

bibby · Answer

you have two proprtions
100stamps      100,000,000 stamps
---------   = ------------
0.78mm            ?? mm

anonymous · Answer

You cross out two zeros from 100,000,000 because of the zeros from 100 then multiply .78 mm by 1,000,000 and you should get 780,000