A number is expressed in scientific notation if it is in the form c 10n where 1 c < 10 and n is an integer.
Multiplication (the “easy” operation – remember that you just need to multiply the main numbers and add the exponents).
The volume of concrete that was used to construct the Hoover Dam is about 3,325,000 cubic yards. One cubic yard of concrete weighs about 4050 pounds. About how many pounds of concrete were used to construct the Hoover Dam?
Pounds of concrete = Weight per cubic yard Number of cubic yards
= 4050 3,325,000
= (4,05 103)(3.325 106)
= 1.346625 1010