Here are the prices of two gyms:
• Gym A has a membership fee of $30 plus $5 per month for every month you are a member of the gym
• Gym B has no membership fee but charges $10 per month for every month you are a member of the gym
If you were two join Gym A, at least how long would it take before you are paying less than Gym B ?
a. 5 months
b. 6 months
c. 7 months
d. 8 months