What is 71.09 rounded off to the nearest whole number

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

What is the slope of a line that is perpendicular to y = 3x + 1

Abank gives 6.5% interest per year. what is the growth factor b in this situation?