7 x 10^5
+ 2 x 10^4
+ 0 x 10^3
+ 0 x 10^2
+ 8 x 10^1
+ 0 x 10^0
Change in temperature = Final temp. - Initial temp.
⇒ -5 - 20 = -25 F
So, Temperature fall be 25 degree. [ -ve sign shows temperature fall]
Hope this helps!
What exactly where you asked to do?
make x subject of formula?
Mc hammer decided by fast