c) The calculation that NASA scientists did to find the rate of increase in the change in global surface area temperature is best represented by: \( (0.9-0.1) \div(2020-1880) \) \( (0.9+0.1) \div(1880-2020) \) \( (-0.1+0.9) \div(2020-1880) \) \( (0.9-(-0.1)) \div(2020-1880) \)

To find the rate of increase in the change in global surface area temperature, we need to calculate the difference in temperature over a given period of time. Given the options: 1. \( (0.9-0.1) \div(2020-1880) \) 2. \( (0.9+0.1) \div(1880-2020) \) 3. \( (-0.1+0.9) \div(2020-1880) \) 4. \( (0.9-(-0.1)) \div(2020-1880) \) Let's calculate each option to determine the correct representation of the rate of increase in the change in global surface area temperature. Calculate the value by following steps: - step0: Calculate: \(\left(0.9-0.1\right)\div \left(2020-1880\right)\) - step1: Subtract the numbers: \(0.8\div \left(2020-1880\right)\) - step2: Subtract the numbers: \(0.8\div 140\) - step3: Convert the expressions: \(\frac{4}{5}\div 140\) - step4: Multiply by the reciprocal: \(\frac{4}{5}\times \frac{1}{140}\) - step5: Reduce the numbers: \(\frac{1}{5}\times \frac{1}{35}\) - step6: Multiply the fractions: \(\frac{1}{5\times 35}\) - step7: Multiply: \(\frac{1}{175}\) Calculate or simplify the expression \( (0.9+0.1) \div (1880-2020) \). Calculate the value by following steps: - step0: Calculate: \(\left(0.9+0.1\right)\div \left(1880-2020\right)\) - step1: Add the numbers: \(1\div \left(1880-2020\right)\) - step2: Subtract the numbers: \(1\div \left(-140\right)\) - step3: Rewrite the expression: \(\frac{1}{-140}\) - step4: Rewrite the fraction: \(-\frac{1}{140}\) Calculate or simplify the expression \( (-0.1+0.9) \div (2020-1880) \). Calculate the value by following steps: - step0: Calculate: \(\left(-0.1+0.9\right)\div \left(2020-1880\right)\) - step1: Add the numbers: \(0.8\div \left(2020-1880\right)\) - step2: Subtract the numbers: \(0.8\div 140\) - step3: Convert the expressions: \(\frac{4}{5}\div 140\) - step4: Multiply by the reciprocal: \(\frac{4}{5}\times \frac{1}{140}\) - step5: Reduce the numbers: \(\frac{1}{5}\times \frac{1}{35}\) - step6: Multiply the fractions: \(\frac{1}{5\times 35}\) - step7: Multiply: \(\frac{1}{175}\) Calculate or simplify the expression \( (0.9-(-0.1)) \div (2020-1880) \). Calculate the value by following steps: - step0: Calculate: \(\left(0.9-\left(-0.1\right)\right)\div \left(2020-1880\right)\) - step1: Remove the parentheses: \(\left(0.9+0.1\right)\div \left(2020-1880\right)\) - step2: Add the numbers: \(1\div \left(2020-1880\right)\) - step3: Subtract the numbers: \(1\div 140\) - step4: Rewrite the expression: \(\frac{1}{140}\) The correct representation of the rate of increase in the change in global surface area temperature is option 1: \( (0.9-0.1) \div(2020-1880) \).