How to multiply and divide with scientific notation?

To multiply two scientific notation numbers, multiply their coefficients and add their exponents. To divide two scientific notation numbers, divide their coefficients and subtract their exponents

example multiply:  2 x 10^4  times 4 x 10^6 = 2x4 = 8 x 10 ^ 10

Example divide: 10 x ^8 divided by 5 x 10^4 = 10/5 = 2 x 10^4

step-by-step explanation:

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δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)