PLEASE HURRY
A biologist estimated the number of cells in a culture sample as 1.3 × 102. One week later, he looked at the same culture sample and estimated that the number of cells had grown to 3.9 × 105.

Determine how many times larger the culture sample was compared to a week earlier.

(3.9 × 105)
(1.3 × 102)

Complete the quotient in scientific notation and find the solution in standard notation.

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