(0.5)² = A)2.5 × 10^-2 B)0.25 C)2.5 D)1.0

Question

Quizplus · Accepted Answer

Starting from the left, the first operation is subtraction: 1 minus 0.5 equals 0.5. The next operation is multiplication: 0.5 multiplied by 10 equals 5. After this, there is a unit symbol U1, which means to move the decimal point one place to the left, resulting in 0.5. The next operation is multiplication again: 0.5 multiplied by 10 raised to the power of 1 (or just 10) equals 5. Finally, there are two sequential unit symbols S1 which means to move the decimal point one place to the right twice, resulting in 0.05. The last operation is addition: 5 plus 0.05 equals 5.05. However, the given answer choices are not precise, as they do not follow the syntax of scientific notation. The correct answer in scientific notation would be 5.05 × 10S-1. To compare this answer with the given choices, we can convert it back to standard form: 0.505. This matches with choice B, which is 0.25. Therefore, the best choice is B.

(0.5)2 =

(0.5)² =