Answer:
0.10 °F/year
Explanation:
rate of temperature change in degrees per year is calculated by
dividing the total change in temperature by no. of years in which that change if temperature took place.
rate of temperature change = total change in temperature/no. of years
given
period of years = 1990-1960
no. of year = 1990-1960 = 30 years
total change in temperature = 3°F
the rate of temperature change = 3°F/30 years = 0.10 °F/year
the rate of temperature change is 0.10 °F/year.
