Scientific notation

Approximately 7.5x105 gallons of water flow over a waterfall each second. There are 8.6x104 seconds in 1 day. Select the approximate number of gallons of water that flow over the waterfall in 1 day.

Result

x =  64500000000

Solution:

$a=7.5 \cdot \ 10^5=750000 \ \text{g/s} \ \\ b=8.6 \cdot \ 10^4=86000 \ \text{s} \ \\ \ \\ x=a \cdot \ b=750000 \cdot \ 86000=64500000000=6.450000\cdot 10^{ 10 }$

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Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Dr Math
= 6.45 x 1010 in scientific notation

Math student
(4×104)×(2×107)

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