Question

Express the exponential number 5.15 x 10⁵ as an ordinary number.

a) 515,000
b) 5,150
c) 0.000515
d) 51,500

Answer 1

The exponential number 5.15 x 10⁵ when expressed as an ordinary number is 515,000. This is found by moving the decimal point five places to the right due to the exponent of 5.

The Correct Option is; is (a) 515,000.

Step-by-step explanation:

The exponential number 5.15 x 10⁵ expressed as an ordinary number would be 515,000. This is achieved by moving the decimal point five places to the right, since the exponent on the 10 is positive and equals 5, resulting in the proper placement of digits for the standard form of the number.

Here's a step-by-step process to convert from scientific to standard notation:

1. Start with the scientific notation expression: 5.15 x 10⁵.
2. Because the exponent on the 10 is 5, move the decimal point in 5.15 five places to the right.
3. Filling in zeros as needed, this gives us 515,000.

Therefore, the correct answer among the options provided is (a) 515,000.