Question

what is the value of 1,210,000 in scientific notation?
1.21 × 10⁴
1.21 × 10⁵
121 × 10³
1.21 × 10⁶
12.1 × 10⁻⁵

Explanation:

Step1: Recall Scientific Notation Rule

Scientific notation is in the form \( a \times 10^n \), where \( 1 \leq |a| < 10 \) and \( n \) is an integer.

Step2: Convert 1,210,000 to Scientific Notation

Move the decimal point to the left until there is one non - zero digit to the left of the decimal point. For 1,210,000, we move the decimal point 6 places to the left to get \( 1.21 \). The number of places we moved the decimal point is the exponent \( n \), so \( n = 6 \). Thus, \( 1,210,000=1.21\times10^{6} \).

Answer:

\( 1.21\times10^{6} \) (corresponding to the option with the red dot: \( 1.21\times10^{6} \))