Rosa's family wants to switch cell phone plans. Cloud Line Cell Service is offering a one-time discount of $25 for families that
use multiple phones with their service. Rosa's family uses 4 phones, and the salesperson said the first month's payment, which includes the discount and the regular monthly rate for each phone, will be $71. Which equation can Rosa use to find x, the regular monthly rate for each phone?
In order to find circumference you use the formula C (circumference)=2(pi)(r) in which r is the radius. In this case, two and 15 are thirty so to find the circumference all you have is the equation 30 times pi centimeters is equal to the Circumference.
