2,500,000
2.5 billion = 2500000000 = 2.5*10^9
2.5 x 109 is wrong. 2.5 x 109 would be "2500000000 The correct answer is 2.5 x 1010 or 25 x 109 (But this would not be in true scientific notation). Scientific notation is basically calculated by how many times you would move the decimal point (as a result of multiplying by 10). As follows. 2.5 x 109 = 2500000000 2.5 x 1010 = 25000000000 Not sure how old this question is but thought i would answer anyway.
A positive number. Positive Number x Positive Number = Positive Number Positive Number x Negative Number = Negative Number Negative Number x Negative Number = Positive Number
A real number which is not a rational number is an irrational number.
-1.3636363636 = -1 3636363636/10000000000 = -1 909090909/2500000000
2500000000
2500000000
2083333.3333
2,500,000
2500000000
2.5 billion = 2500000000 = 2.5*10^9
Two billion five hundred million (or alternatively Two and a half billion)
1 + 3 + 5 + ... + 99995 + 99997 + 99999 = 2500000000
5.6312121212 as a fraction is 5 and 6312121212 / 10000000000, which reduces to 5 and 1578030303 / 2500000000.
20,000,000 is 20 million, so 7 zeros
2.5 x 109 is wrong. 2.5 x 109 would be "2500000000 The correct answer is 2.5 x 1010 or 25 x 109 (But this would not be in true scientific notation). Scientific notation is basically calculated by how many times you would move the decimal point (as a result of multiplying by 10). As follows. 2.5 x 109 = 2500000000 2.5 x 1010 = 25000000000 Not sure how old this question is but thought i would answer anyway.