Question

3.2 x 10-4 is equal to _____.

A) 0.00032
B) 0.0032
C) 0.032
D) 3.2

Answer 1

3.2 x 10^-4 in standard decimal form is 0.00032. The exponent -4 in scientific notation indicates that the decimal point is moved 4 places to the left, leading to option A) being the correct answer.

Step-by-step explanation:

3.2 x 10-4 is equal to which number? The given expression is in scientific notation, which is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. In scientific notation, a number is written as the product of two parts: a decimal part and a power of 10. The decimal part must be at least 1 but less than 10, and the power of 10 shows how many places to move the decimal point.

To convert 3.2 x 10-4 to standard decimal form, we move the decimal point 4 places to the left (because the exponent is -4), filling in with zeros as needed. So the expression becomes:

0.00032

Therefore, 3.2 x 10-4 is equal to 0.00032, which corresponds to option A).