Answer:
Option a
Step-by-step explanation:
Given that temperature originally was t.
It was decreasing continuously overnight.
finally the temperature reading was -12.8 degree C
Given that it decreased by 15.2 degree C
This means original temperature -15.2 = new temperature -12.8
i.e. t-15.2 = -12.8 is the correct equation.
Option a is right.
Verify:
Solve to get t = 15.2-12.8 = 2.4
Hence when 2.4 decreases by 15.2 we get new temperature
= 2.4-15.2 = -12.8
