Question

The total number of Living humans on Earth was converted to scientific notation using an ontine calculator and was reported to be approximately 7.158 x10^9 Write Earth's population as a single digit times an integer power of 10 and in standard form

Answer 1

7.158 x 10^9 rounds to 7 x 10^9

7 x 10^9 means 7 followed by 9 zeros.

7.158 * 10^9 is approximately equal to 7 * 10^9 = 7,000,000,000