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
Use MATH-WAY it has all the answer
Answer:
Option A)

Step-by-step explanation:
We are given the following in the question:
V varies jointly as h and the fifth power of r.

Combing the two equations, we get,

Now, removing the sign of proportionality and adding the constant of proportionality, we get,

where k is the constant of proportionality.
Thus, the correct answer is
Option A)
