Write the following value in scientific notation.

0.00000021

i think its 2.1x10 but i really think its wrong

2.1x10^-7

To write the value 0.00000021 in scientific notation, we need to express it as the product of a number between 1 and 10 and a power of 10.

First, let's count the number of decimal places we need to move the decimal point to get a number between 1 and 10. In this case, we need to move the decimal point 8 places to the right to obtain 2.1.

Since we moved the decimal point 8 places to the right, we need to compensate by multiplying by 10 raised to the power of -8.

Therefore, the value 0.00000021 can be expressed in scientific notation as 2.1 × 10^-8.