http://www.webmath.com/_answer.php Problem #3 on pretest Answer A To convert 3 × 106 into regular notation: To convert 3.0 into regular format, move the decimal point to the right 6 places. Why? Because that's what × 106 means: multiply by a 1 with 6 zero(s) after it. And, with each zero in a multiplication, the decimal moves to the right 1 place. Since this number only has 1 places after the decimal, we'll have to add 5 zeros to the end of it until the decimal point is moved 6 places to the right. So 3.0 × 106 written in regular notation is Answer is 3,000,000 Answer B To convert .003 × 103 into regular notation: To convert .003 into regular format, move the decimal point to the right 3 places. Why? Because that's what × 103 means: multiply by a 1 with 3 zero(s) after it. And, with each zero in a multiplication, the decimal moves to the right 1 place. So .003 × 103 written in regular notation is Answser is 3 ***Answer C. To convert 3 × 10-6 into regular notation: To convert 3.0 into regular format, move the decimal point to the left 6 places. Why? Because that's what × 10-6 means: divide by a 1 with 6 zeros after it. And, with each zero in a division, the decimal moves to the left 1 place. Since this number only has 2 places before the decimal, we'll have to add 5 zero(s) to the beginning of it until the decimal point is moved 6 places to the left. So 3.0 × 10-6 written in regular notation is Answer is .0000030 Answer D To convert .003 × 10-3 into regular notation: To convert .003 into regular format, move the decimal point to the left 3 places. Why? Because that's what × 10-3 means: divide by a 1 with 3 zeros after it. And, with each zero in a division, the decimal moves to the left 1 place. Since this number only has 4 places before the decimal, we'll have to add 3 zero(s) to the beginning of it until the decimal point is moved 3 places to the left. So .003 × 10-3 written in regular notation is Answer is .000003