Question

use the data in the table to answer the problems 28 - 30.
gases in earths atmosphere

1. a. analyze nitrogen makes up what percent of earths atmosphere?

round to the nearest whole - number percent.
b. write the answer to a as an unreduced fraction and as a decimal
number.

Explanation:

Step1: Find the percentage of nitrogen

From the table, the percentage of nitrogen is \(78.08\%\).

Step2: Round to the nearest whole - number percent

To round \(78.08\%\) to the nearest whole number, we look at the digit in the tenths place. The digit in the tenths place is \(0\). Since \(0<5\), we round down. So \(78.08\%\approx78\%\).

Step3: Write as an unreduced fraction

\(78.08\%=\frac{78.08}{100}\)

Step4: Write as a decimal number

\(78.08\% = 0.7808\)

Answer:

a. \(78\%\)
b. Unreduced fraction: \(\frac{78.08}{100}\), Decimal number: \(0.7808\)