Answer: B
Step-by-step explanation:
If there is a change in something it normal means you subtract 1 number from another.
In this case the two values were 5 and -11.
At midday for answer b, it was 5 and at midnight it -11. It then wants to know the change in temperature which would result in an expression of 5-(-11).
Interests rate is 2% and is 10 years it will be 60
For the first month it will be $40 for the service and $35 to activate the phone service. After the first month it will only be $40 but for the first month it will be $75