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(1 point)
• He knows that 100 is 10 to the power of 3, so he needs to move the decimal point in 1.39 three places to the right.
• He knows that 100 is 10 to the power of 2, so he needs to move the decimal! point in 1.39 two places to the left.
• He knows that 100 is 10 to the power of 3, so he needs to move the decimal point in 1.39 three places to the left.
• He knows that 100 is 10 to the power of 2, so he needs to move the decimal! point in 1.39 two places to the right.
1 answer
To find the product of $1.39 and 100, Justin can use the method that involves moving the decimal point.
Since 100 is equal to \( 10^2 \), Justin should move the decimal point in 1.39 two places to the right (because multiplying by 100, or \( 10^2 \), increases the value).
Therefore, the correct method for Justin to use is:
• He knows that 100 is 10 to the power of 2, so he needs to move the decimal point in 1.39 two places to the right.
