1.0 × 10-9 written in regular notation is 0.0000000010
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8 is twice as big as 4. 9 x 8 is twice as big as 9 x 4.
√(7290) √(81) x √(90) 9 x √(9) x √(10) 9 x 3 x √(10) 27√10
9 - x ≥ 10 9 ≥ 10 + x -1 ≥ x or x ≤ -1
It is: 4.53*10^9
First 9 X 10 is easy to calculate. Any number times 10 is that number with a 0 added.9 X 10 = 90Then you just add the 9 to it to have the same answer as if you multiplied 9 X 11.90 + 9 = 99or9 X 11 = 99