sorry i cant help on that its tricky but try 8???
Answer:
C
Step-by-step explanation:
21 it is the fifth number
-0.5°C every hour
Step-by-step explanation:as the temperature of the bottom of the mountain changed at 1/5 the rate of temperatures change on the top of the mountain, so, the hourly rate of temperature change at the bottom of the mountain is=
-2.5×(1/5)
=-0.5
(X+7/4)=1/16
.