7.9 × 10-3 written in standard notation is 0.0079
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0.079 × 103 written in standard notation is 79
I'm not sure what number "10 squared 5" is. Instead of 79 times 10 to the whatever that exponent turns out to be, make it 7.9 times 10 to the one more than that.
7.9 x 10^6
7.9 X 101 =======
Well, honey, 10 goes into 79 a total of 7 times with a remainder of 9. So, the quotient is 7 and the remainder is 9. Math lesson over, next!